SEIKO - Service Manuals
740 manuals available for download
SEIKO is a world-renowned horologist brand with an extensive catalog of technical documentation spanning quartz and mechanical timepiece movements. Whether you need a detailed service manual for routine maintenance, a comprehensive repair manual for complex assembly procedures, or a workshop manual with parts lists and lubrication specifications, our collection delivers the precise technical guidance required by professional watchmakers and technicians. Access owner's manuals, troubleshooting guides, and maintenance documentation as instant PDF downloads, covering calibers from entry-level quartz movements to advanced power resource systems. Our resource library ensures you have the authoritative technical references needed for any SEIKO horological service or restoration project.
7D48 Technical Instruction - Assembly and Lubrication Manual
Comprehensive technical instruction manual for the Seiko 7D48 movement, providing professional-grade guidance on complete assembly procedures. Covers switching unit assembly, wheel train assembly, and circuit assembly with detailed illustrations throughout. Includes precise specifications for all lubrication points, with designated oil formulations (A0-3, A0-3II-1, A0-3II-2, A0-3II-3, A0-2II-1) and step-by-step pivot lubrication instructions to ensure optimal movement performance. Features critical identification notes for distinguishing 7J-series components from 5J2-series alternatives, helping technicians avoid costly mistakes during assembly. Emphasizes proper handling techniques to prevent component deformation during the rebuild process. Essential reference for watchmakers and movement technicians performing overhauls or service work on this quartz movement.
Cal V10 Series Technical Data and Parts List – Analogue Quartz
Technical data sheet and comprehensive parts list for the Seiko Cal V10 series analogue quartz movement. Provides complete specifications for models V102A and V103A, documenting movement dimensions (Ø26.4 mm × 23.5 mm, height 3.59 mm / 3.31 mm), 3-jewel construction, and the step motor load-compensative driving pulse system architecture. Covers circuit block structure with detailed component diagrams and screw specifications. Includes illustrated disassembly and reassembly procedures tailored for both circular and square case installations, supported by lubrication guidelines and cleaning protocols specific to quartz watch servicing. Presents systematic checking and adjustment procedures encompassing quick start function verification, capacitor testing (including EECW 1RE334 reference), circuit block conductivity checks, coil block diagnostics, output signal analysis, accuracy measurements, and current consumption profiling. An essential workshop manual for technicians performing maintenance, repair, or full calibration of Cal V10 series timepieces.
Cal V10 Series Technical Guide and Parts List
Comprehensive technical guide and parts list for the SEIKO Cal V10 series of analogue quartz watches, covering solar and capacitor-driven models V102A and V103A. This workshop manual provides detailed specifications on the three-hand indication system, step motor load-compensative driving pulse architecture, and complete circuit block structure. Includes disassembly and reassembly procedures for both circular and square case designs, with step-by-step guidance on calendar and quick-set mechanisms. Features thorough maintenance instructions covering lubrication points, cleaning protocols, and systematic checking and adjustment procedures—including quick start function verification, capacitor charge testing, circuit conductivity measurements, movement calibration, reset condition protocols, coil block assessment, output signal verification, accuracy checks, and current consumption analysis. Supplemented with comprehensive illustrated parts lists showing exploded diagrams for complete component identification and sourcing.
Cal Y785A Digital Quartz Watch Technical Guide and Parts List
Complete technical guide and parts list for the Seiko Cal Y785A digital quartz watch movement. This service manual covers full specifications, operational temperature range (-30°C to +50°C), and detailed display functions including time, stopwatch, alarm, and time-setting procedures. Comprehensive movement diagrams show both front and rear views for workshop reference. Step-by-step disassembly, reassembly, and lubrication procedures are explained for maintenance and repair work. The movement features a nematic liquid crystal display with FEM technology for reliable low-temperature operation. Battery options include Maxell CR2016, Matsushita BR2016, or Sanyo CR2016 cells (3.0V nominal, ~5 year lifespan under normal conditions). Accuracy specification: less than 20 seconds monthly rate loss within normal operating temperature range. Case dimensions: ⌀28.1 mm × 4.9 mm. Complete parts list included for ordering and identifying all service components.
Cal. 1N00A and 1N01A Parts Catalogue and Technical Guide
Comprehensive parts catalogue and technical service guide for Seiko quartz watch movements Cal. 1N00A and 1N01A. This workshop manual covers detailed specifications, exploded movement diagrams with systematically numbered components, step-by-step disassembly and reassembly procedures, and lubrication protocols using Moebius A oil. Includes critical technical data on coil block resistance and current consumption for diagnostics and performance verification. Detailed comparative notes document caliber differences and identify alternative parts across key assemblies—hour wheel, circuit block, coil block, rotor stator, setting wheel, clutch wheel, and minute wheel—essential for accurate parts sourcing and cross-reference during repair and maintenance operations.
Cal. 2K02A, 2K03A Parts Catalogue and Technical Guide
Comprehensive parts catalogue and technical service manual for Seiko Cal. 2K02A and 2K03A quartz watch movements. This workshop guide covers complete movement specifications including 18.4 mm diameter, 2.5 mm height, three-hand display configuration, and step motor drive system. Detailed disassembly and reassembly procedures with numbered technical diagrams walk technicians through every stage of service work. The parts list provides full reference numbers for all components, while dedicated sections address lubrication requirements, circuit block architecture with C-MOS IC integration, and electrical parameter verification including coil block resistance values (2.3kΩ–2.7kΩ range) and current consumption testing. Assembly notes ensure proper train wheel setting lever adjustment and train wheel bridge positioning for accurate timekeeping. Essential reference for professional watch repair, maintenance, and parts identification.
Cal. 5E20A Parts Catalogue and Technical Guide
Comprehensive parts catalogue and technical service manual for the Seiko Cal. 5E20A quartz watch movement. Covers detailed movement specifications, complete numbered parts list with technical diagrams for accurate component identification, step-by-step disassembly and reassembly procedures, lubrication specifications and requirements, circuit block architecture and function, and value checking protocols for coil block resistance measurement and current consumption testing. An essential workshop reference for technicians performing maintenance, repairs, and module-level diagnostics on this movement platform.
Cal. 5G23A Parts Catalogue and Technical Guide
Complete parts catalogue and technical guide for the Seiko Cal. 5G23A quartz movement, essential for watch repair professionals and service technicians. This workshop manual delivers detailed specifications alongside systematic disassembly and reassembly procedures for servicing this step-motor-driven caliber. Numbered parts diagrams show each component's location and function, enabling accurate identification during repair work. The guide covers lubrication points and procedures critical to smooth operation, circuit block structure and electronic function value-checking protocols, the day-date calendar mechanism and calendar setting device, train wheel adjustment system, and electronic circuit reset switch configuration. Also included are specifications for the battery life indicator system and 3V lithium battery requirements. An indispensable reference for maintaining and repairing watches fitted with this reliable quartz movement.
Cal. 5L14A, 5L15A Parts Catalogue and Technical Guide
Seiko parts catalogue and technical guide covering the Cal. 5L14A and Cal. 5L15A quartz watch movements. This workshop manual provides the detailed specifications engineers and repair technicians need: movement diameter Ø25.4 mm external, Ø23.3 mm casing, 2.8 mm height, with configurations for 2 or 3-hand time indication. The guide covers the step motor with load-compensated driving pulse technology, the instant date-setting calendar mechanism, and battery specifications (SEIKO SR920SW/Maxell SR920SW/Sony Eveready 371; 1.55V, approximately 5-year service life). Features complete exploded parts diagram with numbered component identification and step-by-step disassembly and reassembly instructions. Includes 3-jewel bearing specifications essential for service and maintenance work on these reliable quartz movements.
Cal. 5M22A/5M23A Power Resource Change Supplement
Supplement to the parts catalogue and technical guide for Seiko Cal. 5M22A and 5M23A movements, detailing the transition from the original capacitor unit (3029 111) to the new rechargeable battery unit (3023 44Z). This service manual documents the enhanced performance characteristics and extended operational duration of the newer power source. Includes a comparative performance matrix contrasting indicator display duration and oscillation counts between both power configurations, a detailed parts list with visual identification aids for the capacitor clamp, rechargeable battery clamp, and insulator assemblies, and specifications for distinguishing original components from replacement units. References compatibility requirements and parts ordering procedures valid from June 2000 onwards.
Cal. 6F24A Parts Catalogue and Technical Guide
Parts catalogue and technical service guide for the Seiko Cal. 6F24A quartz movement. This workshop manual provides comprehensive reference material for technicians servicing and maintaining this precision timepiece mechanism. Features 40 detailed exploded view diagrams identifying every component, along with complete movement specifications: 19.0–22.0mm outside diameter, Ø24.0mm case diameter, 3.2mm height, and standard 3-hand configuration. Battery data covers compatible silver-oxide cells (SEIKO SR920SW, Maxell SR920SW, SONY SR920SW, Matsushita SR920SW, EVEREADY 371) rated 1.55V with approximately 3 years service life. The guide documents the stop motor driving system with load-compensated pulse control, and covers all integrated functions including numerical date calendar, moon phase display, instant moon phase correction device, rapid calendar setting mechanism, and train wheel adjustment provision. Detailed lubrication schedules specify approved oils (Moebius A and SEIKO Watch Oil S-6) for proper maintenance. Step-by-step disassembly and reassembly procedures ensure correct handling and restoration. Precision specifications include 10-second measuring gate standard, no active regulation system, monthly rate tolerance of less than 15 seconds, and single jewel bearing. Published by Hattori Seiko Co., Ltd.
Cal. 7F18A Parts Catalogue and Technical Guide
Parts catalogue and technical guide for the Seiko Cal. 7F18A watch movement. This service manual provides detailed movement specifications, technical diagrams, step-by-step disassembly and reassembly procedures, a comprehensive parts list with component illustrations, and complete lubrication instructions. Covers solar position display, moon phase display, date and day hands, and instant-setting devices. The movement features a step motor driving system with 2-hand time indication, monthly rate accuracy of less than 15 seconds, and approximately 3 years of battery life. An essential workshop reference for technicians servicing and maintaining this quartz calendar movement.
Cal. 7M Series Parts Catalogue and Technical Guide Supplement
Supplement to the parts catalogue and technical guide for Seiko Cal. 7M Series watches. This repair manual provides troubleshooting procedures for oscillating weight malfunctions, detailed service notes on the automatic power-generating mechanism with lubrication protocols, and documentation of structural modifications to the intermediate wheel and generating rotor. Includes post-repair testing procedures to verify power generation efficiency and sustained operational performance. An essential workshop reference for technicians servicing these movements.
Cal. 7N00A, 7N01A Parts Catalogue and Technical Guide
Parts catalogue and technical guide for Seiko Cal. 7N00A and 7N01A quartz watch movements. This service manual covers complete specifications, exploded diagrams of all movement components, detailed parts list with part numbers for accurate replacement and sourcing, hand installation height specifications to ensure proper alignment, combination tables for center wheels, fourth wheels and hour wheels to verify correct assembly configurations, step-by-step disassembly and reassembly procedures, circuit block structure diagrams, and electrical specification data including coil resistance measurements and current consumption values. Essential reference for watchmakers and technicians performing maintenance, repair and module replacement on these movements.
Cal. 8M15A and 8M18A Parts Catalogue and Technical Guide
Seiko Cal. 8M15A and 8M18A quartz watch movement parts catalogue and technical service manual. This workshop guide delivers specifications, exploded parts diagrams with component callouts, step-by-step disassembly and reassembly procedures, and lubrication guidance essential for bench work. Covers hands installation alignment, mode indicator adjustment, dial removal techniques, battery replacement protocols, and circuit block identification. Includes practical notes on assembly clearances, component variations between calibers, and calibration adjustments needed for accurate timekeeping. An indispensable reference for watch technicians and repair specialists working with these popular Seiko quartz movements.
Cal. 8N20A Parts Catalogue and Technical Guide
Complete parts catalogue and technical guide for the Seiko Cal. 8N20A quartz watch movement. This workshop manual covers movement specifications and dimensions, detailed disassembly and reassembly procedures, comprehensive parts list with numbered components and exploded diagrams, lubrication schedules, value checking protocols, and time accuracy adjustment instructions. Includes circuit block structure diagram, battery specifications, and technical remarks on key assemblies including train wheel bridge, setting lever mechanism, and winding stem selection. Essential reference for service technicians and watch repair professionals working with this movement.
Cal. S129A Stopwatch Parts Catalogue & Technical Guide
Complete service manual and parts catalogue for the Seiko Cal. S129A stopwatch module, essential for technicians performing maintenance, repair, or component replacement on this digital timing system. Covers full technical specifications including case dimensions of 198.1 × 81.6 mm and 28.5 mm height, Nematic Liquid Crystal display with 1/4 multiplex driving architecture for clear elapsed-time readout. Detailed reference for stopwatch operation up to 10 hours, split-time and lap-time capture, accumulated elapsed-time measurement, integrated time and calendar functions, and 100-entry memory storage. Operational features documented include audible confirmation and memory-overflow warning signals, battery-life indicator display, and automatic start triggering. Thermal serial dot printing system specifications provided, rated at approximately 1.5 lines per second for receipt or data printout. Battery requirements clearly outlined: CR2032 coin cell delivering approximately 5 years of stopwatch operation, plus AA manganese or alkaline batteries powering the thermal printer module. An indispensable troubleshooting and parts-identification resource for service centers and electronics technicians.
Cal. SP11 Parts List and Assembly Diagrams
Single-page parts list and assembly diagrams for the Seiko Cal. SP11 movement, featuring detailed exploded views with part numbers and reference tables. Covers the circuit block (4001 575), power switch, paper feed switch, battery connections (A, B, C, D), printer guide frame, printer unit, printer spacer, and printer plug. Essential reference for anyone servicing or restoring this printer movement, with clear component illustrations and part identification for accurate reassembly and repair work.
Cal. V231A Analogue Quartz Service Manual and Parts List
Service manual and parts list for the Seiko Cal. V231A analogue quartz movement. This workshop manual provides complete technical specifications, circuit block structure diagram, and step-by-step disassembly and reassembly procedures with detailed illustrations covering hands, hour wheel removal, and battery clamp screw installation. Includes comprehensive parts list with component references for all movement assemblies. Essential troubleshooting and maintenance guidance for technicians servicing this quartz calibre.
Cal. V250A V251A Analogue Quartz Technical Guide and Parts List
Technical service manual for Seiko Calibre V250A and V251A analogue quartz movements. This workshop manual provides complete specifications including 0 jewels, step motor configuration, 17.8 mm case diameter, and 2.4 mm height. Covers fastener specifications for all screws used throughout the movement, detailed disassembly and reassembly procedures specific to the V251A caliber with full lubrication data for proper maintenance. Includes systematic checking and adjustment procedures to ensure accurate timekeeping. Comprehensive parts list cross-references every component with manufacturer part numbers for straightforward identification and ordering. Essential reference for watchmakers, repair technicians, and authorized service centers maintaining these compact quartz calibers.
Cal. V252A Analogue Quartz Technical Guide and Parts List
Technical service manual and parts list for the Seiko Calibre V252A analogue quartz movement. This comprehensive workshop reference covers movement specifications, complete screw inventory, step-by-step disassembly and reassembly procedures with detailed lubrication guidance, circuit block architecture, and systematic checking and adjustment routines for reset condition, output signal verification, battery voltage testing, and coil block performance. Includes mechanical component diagrams with identified parts and train wheel positioning data essential for accurate repair and maintenance work.
Cal. V253A Analogue Quartz Watch Service Manual and Parts List
Service manual and parts list for the Seiko caliber V253A analogue quartz watch movement. This comprehensive workshop manual covers specifications, screw identification and sizing, step-by-step disassembly and reassembly procedures with lubrication guidance, and a complete illustrated parts list. Features exploded diagrams and mechanical schematics essential for movement service and maintenance work.
Cal. V267A Analogue Quartz - Technical Guide and Parts List
Technical service manual for the Seiko Caliber V267A analogue quartz movement. This workshop reference covers complete specifications and step-by-step disassembly and reassembly procedures, including detailed lubrication guidance to ensure proper operation after service. The guide covers circuit block structure verification and output signal adjustment—essential checks for restoring accuracy to quartz timekeeping. Battery testing procedures address voltage measurement and conductivity verification, while current consumption analysis helps diagnose power drain issues. Accuracy verification and fine-tuning methods confirm movement performance meets factory standards. A comprehensive parts list with cross-references identifies every component, simplifying ordering and replacement during repair and maintenance.
Cal. V3 Series Analogue Quartz Technical Guide and Parts List
Complete technical guide and parts list for Seiko Cal. V3 series analogue quartz movements. Covers specifications across fourteen watch models including V300, V301, V312, V313, V320, V321, V322, V329, V332, V333, V342, V343, V347, and V348. The manual walks through full disassembly and reassembly of the calendar mechanism and drive coil gear train selector system, with step-by-step procedures for each stage. Includes detailed cleaning protocols and comprehensive adjustment checks for battery voltage, coil block performance, timekeeping accuracy, reset positioning, and current consumption verification. The lubrication section specifies appropriate lubricant types and application points for optimal movement longevity. Extensive parts listings organized by movement type with cross-reference combinations help technicians identify exact component requirements for service and repair work. An essential workshop reference for anyone performing maintenance or overhauls on Seiko V3 series quartz watch movements.
Cal. V600A Analogue Quartz Service Manual and Parts List
Complete service manual and parts list for the Seiko Cal. V600A analogue quartz watch movement. This workshop manual provides detailed specifications, screw lists, and operating instructions covering mode and button functions, time setting procedures, and hands positioning. Battery replacement procedures are fully illustrated with step-by-step disassembly and reassembly instructions, including precise lubrication specifications for optimal performance. The manual also covers checking and adjustment procedures for circuit blocks and alarm systems, along with comprehensive parts nomenclature and part numbers for accurate identification and ordering. An essential reference for technicians maintaining or repairing this popular quartz caliber.
Cal. V601A Analogue Quartz Technical Guide and Parts List
Complete technical guide and parts list for the Seiko Caliber V601A analogue quartz movement. This workshop manual covers full specifications, comprehensive screw identification, and detailed operating instructions for technicians and watchmakers. Includes step-by-step disassembly and reassembly procedures with precise lubrication guidance, hands installation methods, battery replacement protocol, system reset and time-setting procedures, and thorough checking and adjustment sections covering coil blocks, current consumption analysis, and circuit testing. Features detailed exploded diagrams that illustrate all movement components and correct assembly sequences, making this service manual an essential reference for V601A repair work, maintenance, and diagnostics.
CAL. VO11A Combination Quartz - Technical Guide and Parts List
Technical service manual and parts list for the Seiko CAL. VO11A combination quartz movement. Covers detailed specifications and screw identification, operation of integrated analog and digital displays including timekeeping, calendar, stopwatch and alarm functions, step-by-step disassembly and reassembly procedures with complete lubrication tables, systematic checking and adjustment of battery voltage, coil block performance, current consumption monitoring and bulb inspection. Includes comprehensive parts list with exploded views and component diagrams for all movement sections. Essential reference for technicians servicing or repairing this hybrid quartz caliber.
Cal. W041A Digital Quartz Technical Guide and Parts List
Technical service and repair manual for the Seiko Cal. W041A digital quartz watch movement. This workshop guide provides detailed specifications for the FEM (Field Effect Mode) liquid crystal display and its multi-drive system architecture, step-by-step disassembly and reassembly procedures for the case and module assembly with technical line drawings, precise lubrication charts with application points, systematic checking and adjustment routines for accurate timekeeping and display function, and a comprehensive parts list cross-referenced with Seiko part numbers for sourcing replacements. The movement is powered by a Seiko CR2025 lithium battery, rated for approximately 10 years of service life at 3.0 V nominal voltage. An essential reference for watchmakers and repair technicians working on this movement.
Cal. W309A Digital Quartz Technical Guide and Parts List
Technical service guide and parts reference for the Seiko Caliber W309A digital quartz watch movement. Provides complete specifications and circuit block architecture details for this LCD-based quartz module. Covers full disassembly and reassembly with step-by-step illustrations, allowing technicians to access internal components safely. Includes button operation mechanics and display system functionality. Details all checking and adjustment procedures essential for repair work: battery voltage verification, current consumption measurement, bulb diagnostics, accuracy calibration, and alarm circuit testing. Features a comprehensive parts list cross-referenced with Seiko part numbers and component designations for ordering replacements and identifying every internal assembly.
Cal. Y14 Series Analogue Quartz Technical Guide and Parts List
Technical service manual and parts list for the Seiko Cal. Y14 series analogue quartz watches, covering models Y143A, Y148A, Y142A, Y147A, Y142B, and Y147B. This workshop manual provides detailed specifications alongside step-by-step disassembly and reassembly procedures for the calendar mechanism and circuit block assembly, including the drive coil and gear train selector mechanism. The guide covers lubrication points essential for proper operation, cleaning procedures for plastic components, and comprehensive checking and adjustment procedures for output signal verification, battery voltage and conductivity testing, circuit block conductivity assessment, coil block function, gear train mechanism operation, accuracy calibration, reset condition verification, and current consumption measurement. Includes a complete parts list with part numbers and detailed screw classifications for accurate reassembly. An indispensable reference for technicians servicing these reliable quartz movements.
CAL. Y48 Series Analog Quartz Technical Data
Technical data and service manual for the SEIKO CAL. Y48 series analog quartz movement (Y480A, Y480B, Y481A, Y481B, Y482A). This workshop reference covers complete specifications and circuit block schematics alongside practical disassembly and reassembly procedures. It includes detailed lubrication guidelines, cleaning methods, and comprehensive checking and adjustment protocols essential for service technicians. Battery voltage and life verification sections detail proper testing methodology, while circuit block conductivity checks and coil block testing procedures support reliable performance diagnostics. Accuracy verification and time adjustment techniques round out the repair manual data needed for professional movement maintenance and restoration.
Cal. Y580A Analogue Quartz Watch Technical Guide and Parts List
Technical service manual and parts list for the Seiko Calibre Y580A analogue quartz watch movement. This workshop guide provides detailed specifications for the Y580A platform, including movement dimensions (13.0 mm H x 15.55 mm D), 2-hand time display with monthly rate stability better than 20 seconds loss, circuit block architecture, and step motor compensation driving pulse configuration. The repair manual covers comprehensive checking and adjustment procedures essential for service technicians. Battery specifications detail compatible cells (SEIZAIKEN TR616SW, MAXELL SR616SW, 1.55V nominal, approximately 3-year service life). The troubleshooting and maintenance sections address accuracy testing protocols, output signal verification methods, battery voltage and conductivity assessment, circuit block and coil block conductivity diagnostics, gear train mechanism inspection, and current consumption profiling. Includes jewel specifications (0 jewels in certain variants) and 10-second measuring gate parameters for precision work.
Cal. Y651A Digital Quartz Technical Guide and Parts List
Technical service manual and parts list for the Seiko Calibre Y651A digital quartz movement. Includes detailed specifications, complete circuit schematic, step-by-step disassembly and reassembly procedures for the case and movement, cleaning protocols, adjustment and verification procedures supported by control flowcharts, and a comprehensive parts list with all component references. Essential reference for workshop repair and maintenance of this caliber.
Cal. Y652A Technical Guide and Parts List - Combination Quartz
Technical service manual and parts list for the Seiko Caliber Y652A combination quartz movement, covering both analog and digital display integration. Detailed specifications for the 2-jewel quartz mechanism with electronic circuit reset and second-hand setting device. Includes circuit block schematic documentation, time setting and display function procedures, step-by-step disassembly and reassembly instructions with lubrication protocols, cleaning methodology, and a thorough checking and adjustment guide for complete functional verification of all components.
Cal. Y661A & Y662A Digital Quartz Technical Data
Technical data document for Seiko calibers Y661A and Y662A digital quartz movements. Provides detailed specifications including display medium (nematic liquid crystal with FEM), casing diameter (17.5 mm), height (4.4 mm), and battery information (MAXELL SR721W, 1.55V). Includes circuit block schematic with component identification, cleaning protocols with parts classification, and checking and adjustment procedures covering battery voltage testing, circuit block diagnostics, current consumption measurement, timekeeping accuracy verification, speaker block operation, switch component functionality, and operational checks. Contains detailed technical diagrams illustrating case construction, battery placement, module assembly, and winding stem mechanism. Essential reference documentation for technicians servicing these digital quartz movements.
CAL. Y703A Digital Quartz Watch Technical Manual
Complete technical manual and service reference for the SEIKO CAL. Y703A digital quartz watch movement. This workshop manual provides everything needed for professional repair, maintenance, and troubleshooting of this caliber. Includes full specifications and detailed disassembly and reassembly procedures for the case and module. Covers lubrication and cleaning techniques essential for optimal performance. Comprehensive checking and adjustment procedures guide you through battery voltage verification, pattern segment display system diagnostics, liquid crystal panel contact integrity checks, current consumption measurement, time accuracy calibration, speaker block functionality testing, bulb condition assessment, and switch component conductivity verification. An indispensable repair guide for service technicians working on this digital quartz movement.
Cal. Y771A Digital Quartz Technical Guide
Technical service guide for the Seiko Cal. Y771A digital quartz movement, providing the complete technical specifications and repair data needed for professional watch technicians. Documents the Nematic Liquid Crystal FEM display architecture, time/alarm/stopwatch and memory display functions, and the Multiplex segment dot matrix liquid crystal panel drive system with trimmer capacitor regulation. Specifies the 3.0V Lithium battery with approximately 2-year service life. Includes detailed checking and adjustment procedures essential for movement servicing: battery voltage and conductivity verification, current consumption measurement, water resistance testing, liquid crystal panel contact verification and circuit block inspection, accuracy checks, switch component testing, bulb condition assessment, and alarm function validation. Features comprehensive specifications tables, display electrode segment diagrams, and technical reference data specific to the Cal. Y771A movement, making it an indispensable workshop manual for Seiko quartz watch repair and maintenance.
Cal. Y950A Combination Quartz Technical Guide and Parts List
Technical guide and parts list for the Seiko Cal. Y950A combination quartz watch movement, covering both analog and digital display sections. Details the circuit block architecture, LCD panel electrode configurations and their correspondence with output terminals, plus a comprehensive parts list with manufacturer part numbers for every mechanical and electronic component. This service manual provides the technical specifications and component breakdown essential for repair, maintenance, and accurate parts sourcing for this hybrid analog-digital quartz movement.
Cal. Y960A Combination Quartz Technical Guide and Parts List
Technical guide and parts list for the Seiko Caliber Y960A combination quartz watch movement. This workshop manual covers system reset procedures, circuit block installation, full specifications, and detailed operating instructions for calendar and alarm functions. Includes complete disassembly and reassembly procedures with identified lubrication points, systematic checking and adjustment protocols, and a comprehensive parts list with component references and screw specifications. An essential service manual for technicians working with this movement.
Cal.5Y13A Parts Catalogue - Hattori Seiko Co. Ltd
Parts catalogue and exploded view diagram for the Seiko Cal.5Y13A quartz watch movement. This service manual provides a comprehensive labeled schematic of all component positions, including hour, minute and second hands, dial, day star with dial disk, date dial, date dial guard, hour wheel, day corrector, date driving wheel, and internal mechanical assemblies. The parts list assigns numbered references to every element and includes detailed specifications for screws, wheels, springs, and additional mechanical components essential for repair, maintenance, or parts sourcing. An authoritative reference for technicians servicing this reliable quartz caliber.
Caliber V220A Analogue Quartz Technical Guide and Parts List
Technical service manual for the Seiko Caliber V220A analogue quartz movement. This comprehensive workshop guide covers complete specifications, fastener documentation, and step-by-step disassembly and reassembly procedures with detailed lubrication guidance. Includes circuit block testing protocols, battery voltage and conductivity verification, front and rear gear train inspection techniques, reset procedures, and a full parts list with part numbers and component designations. An essential reference for technicians servicing and maintaining this quartz caliber.
Caliber V230A Analogue Quartz Technical Guide and Parts List
Complete technical guide and parts list for the Seiko V230A analogue quartz movement. This service manual covers movement specifications, detailed disassembly and reassembly procedures with identified lubrication points, and comprehensive checking and adjustment methods. Covers output signal verification, battery voltage and conductivity testing, circuit block conductivity assessment, gear train mechanism operation, reset condition procedures, current consumption measurement, accuracy standards, water-resistant quality verification, and appearance inspection. Includes technical drawings and a complete parts list for reference during repair or maintenance work.
Caliber V233A Analogue Quartz Technical Data and Parts List
Technical data and parts list for Seiko Caliber V233A analogue quartz movement. This service manual provides complete specifications for the three-hand indication system, step motor with fixed pulse mechanism, second setting device, and electronic reset switch. Includes disassembly and reassembly procedures with detailed lubricating instructions, hand and dial removal techniques, and battery information covering Seiko TB521SW, Maxell SR521SW, and Sony Eveready 379 cells (1.55V, approximately 2 years service life). Features screw type identification, systematic checking and adjustment procedures, comprehensive parts list with cross-references, and mechanical diagrams with component illustrations essential for workshop repair and maintenance of this popular quartz caliber.
Caliber V602A Analogue Quartz Technical Guide and Parts List
Technical guide and parts list for the Seiko Caliber V602A analogue quartz watch movement. This service manual covers detailed specifications and operating characteristics of the movement, time-setting procedures, hand positioning and adjustment methods, step-by-step battery replacement instructions, complete disassembly and reassembly sequences, and lubrication specifications for optimal performance. A comprehensive resource for watchmakers and technicians performing maintenance and repair work on this movement.
Caliber WO40A Digital Quartz Technical Guide and Parts List
Technical service manual and parts reference for the Seiko Caliber WO40A digital quartz movement. Documents complete specifications and circuit block architecture alongside practical repair and maintenance procedures. Covers disassembly and reassembly of case and module components with detailed lubrication guidance. Includes functional testing protocols for all display modes—time, calendar, alarm, timer, and dual time—plus battery performance analysis and current consumption verification. Features step-by-step alarm condition checks, pattern segment display testing, and illumination bulb diagnostics. Concludes with a comprehensive parts list cross-referenced by component designation, essential for technicians sourcing replacements or validating assembly integrity during servicing.
Caliber Y10/Y11 Series Analogue Quartz Technical Guide
Technical service manual for Seiko Caliber Y10 and Y11 series analogue quartz movements (models Y100A, Y101A, Y102A, Y112A, Y113A). This comprehensive workshop reference covers all essential specifications: timekeeping functions, calendar and additional mechanisms, case and movement dimensions, height measurements, regulation system parameters, measuring gate specifications, battery requirements, and jewel count. Detailed circuit block schematics and a complete screw inventory support systematic disassembly and reassembly procedures for the calendar mechanism and circuit block, with thorough cleaning protocols included. The step motor compensation drive pulse system is documented in full technical detail. Extensive checking and adjustment procedures cover output signal verification, battery voltage and conductivity testing, circuit block conductivity verification, reset and setting operations, coil block testing, accuracy checks, and current consumption measurement. An essential technical resource for servicing these reliable quartz movements.
Caliber Y113A Parts List
Parts list for the Seiko Caliber Y113A quartz watch movement. This comprehensive components catalog details the train wheel bridge assembly, center wheel and associated pinions, minute and hour wheels, setting wheel, and clutch wheel mechanism. It covers the winding stem, setting lever, yoke, and all related springs essential for timekeeping function, as well as battery connection components, rotor assembly elements, and tube assemblies for both the train wheel bridge and battery interface. Also documented are date dial guard fasteners, jewel seat specifications, the circuit block, and technical remarks on day star and date dial design parameters. An essential reference for technicians performing service, repair, or detailed maintenance on this movement.
Caliber Y432B Parts List
Parts list for the Seiko Caliber Y432B mechanical watch movement. This comprehensive parts diagram covers the complete movement assembly including center wheel bridge, third wheel bridge, hour wheel, minute wheel, escape wheel, clutch wheel, yoke lever, dial washer, hour wheel ring, rotor, coil block, step rotor, and circuit block components. Battery assembly specifications reference Maxell SR821SW and Seizaiken TR821SW battery types. An essential reference for technicians performing service, repair, or maintenance work on this caliber.
Caliber Y450A Digital Quartz Technical Guide and Parts List
Technical service manual for the Seiko Caliber Y450A digital quartz movement, providing comprehensive workshop guidance for watch repair and maintenance. Includes detailed specifications, step-by-step disassembly and reassembly procedures for case and module components, cleaning protocols, and systematic checking and adjustment methods. Diagnostic block diagrams help identify and resolve common issues. Features a liquid crystal display electrode schematic for troubleshooting, and a complete parts list organized by part number for easy component identification and ordering. Essential reference for watch technicians and service centers.
Caliber Y481B Parts List
Parts list for the Seiko Caliber Y481B quartz watch movement, providing detailed component references and part numbers essential for service technicians and watchmakers. Documents the auxiliary plate, train wheel assembly, pinions, center wheels, hour wheels, winding stem, setting lever, circuit block, coil block, battery, rotor stator, and battery connection terminals. The manual specifies three distinct movement variants that combine different fourth wheel, center minute wheel, and hour wheel configurations, making it indispensable for identifying correct replacement parts during repair or maintenance. A core workshop reference for anyone servicing this caliber.
Caliber Y486A Digital Quartz Technical Guide and Parts List
Technical service manual for Seiko Caliber Y486A digital quartz movement. Provides complete specifications and circuit block schematics essential for understanding the movement's architecture. Covers full disassembly and reassembly procedures with step-by-step guidance, plus practical cleaning techniques for optimal performance. Includes systematic checking and adjustment procedures supported by detailed diagnostic flowcharts to ensure accurate timekeeping. Comprehensive parts list with genuine part numbers and component illustrations enables precise identification and sourcing during repair or restoration work. An indispensable repair manual and workshop reference for watchmakers and technicians working with this movement.
Caliber Y499A Digital Quartz Technical Guide and Parts List
Technical service manual and parts list for Seiko Caliber Y499A digital quartz watch movement. Provides complete specifications, circuit block schematic diagrams, and systematic disassembly and reassembly procedures for efficient servicing. Includes detailed cleaning instructions, battery voltage checking, current consumption measurement, and conductivity testing protocols. Features step-by-step accuracy adjustment and functioning verification procedures with troubleshooting guidance to resolve common issues. Liquid crystal display module covers time, calendar, and automatic calendar functions across Y490 and Y499 variant models. Complete parts list with manufacturer part numbers enables accurate component identification and replacement. Essential reference for watch technicians and repair professionals handling digital quartz movements of this caliber.
Caliber Y520A Analogue Quartz Technical Guide and Parts List
Comprehensive technical guide and parts list for the Seiko Caliber Y520A analogue quartz movement. Specifications detail the compact Ø11.5 mm diameter, 2.8 mm height (3.1 mm with battery installed), and single jewel construction. The workshop manual covers complete disassembly and reassembly procedures with detailed step-by-step illustrations, including hour and minute hand removal, battery clutch wheel operation, and train wheel bridge screw specifications. Checking and adjustment procedures ensure proper function after service. Fully labeled component diagrams guide technicians through each disassembly stage and reassembly sequence, making this an essential service manual for watchmakers working with this compact quartz caliber.
Caliber Y541A Digital Quartz Technical Guide and Parts List
Complete technical service manual for the Seiko Caliber Y541A digital quartz movement. This workshop guide provides everything needed to service, repair, and maintain this quartz mechanism, including detailed specifications and circuit block architecture. Covers full disassembly and reassembly of the second hand assembly, hour wheel, circuit block, coil block, and gear train with step-by-step procedures. Extensive troubleshooting and adjustment sections address output signal verification, battery voltage and conductivity testing, circuit block and coil block diagnostics, second hand setting conditions, accuracy verification, and fine-tuning for time precision. The movement features three-hand time display, electronic circuit reset switch, battery life indicator, and precision trimmer condenser regulation. Comprehensive illustrated parts list with manufacturer part numbers and component nomenclature. An essential repair reference for watchmakers and technicians working with Seiko quartz calibers.
Caliber Y56 Series Analogue Quartz Watch Technical Guide
Service manual and parts list for the Seiko Caliber Y56 series of analogue quartz watches, covering models Y561, Y562, Y563, Y572, and Y573. This comprehensive workshop manual provides technical specifications, a complete circuit schematic, and step-by-step disassembly and reassembly procedures illustrated with detailed mechanical diagrams. The guide includes systematic lubrication instructions, thorough cleaning procedures, and extensive checking and adjustment protocols—addressing output signal verification, battery voltage testing, circuit block conductivity, coil block function, second hand setting, reset operations, gear train mechanism alignment, and timekeeping accuracy. A full parts list with part numbers and component references covers both mechanical and electronic elements, making this technical documentation essential for service technicians and qualified repair professionals working on these models.
Caliber Y723A Digital Quartz Technical Guide and Parts List
Complete technical guide and parts list for the Seiko Caliber Y723A digital quartz movement. This service manual covers full specifications and detailed disassembly and reassembly procedures for both case and module, with step-by-step cleaning instructions to maintain precision timekeeping. The workshop guide includes comprehensive checking and adjustment procedures supported by detailed flowcharts, battery voltage testing methods, and liquid crystal display electrode mapping for accurate diagnostics. Additional sections address current consumption measurement, accuracy verification protocols, and indicator lamp replacement procedures. Parts nomenclature and component identification ensure correct assembly and sourcing of replacement elements for the Y723A module. Essential reference for technicians servicing Seiko digital quartz watches.
Caliber Y726A Digital Quartz Technical Guide and Parts List
Technical service manual and parts list for the Seiko Caliber Y726A digital quartz movement. Covers detailed specifications and complete disassembly and reassembly procedures for the case assembly, including proper glass removal techniques and switch lead board handling. Documents the four-function changeover system that switches between time display, stopwatch, counter, and time/calendar modes. Features a comprehensive exploded diagram with all case components clearly identified and labeled, along with case screw tightening specifications to ensure proper reassembly and water resistance. An essential workshop reference for watch repair technicians servicing this popular digital quartz caliber.
Caliber Y770A Digital Quartz Technical Service Manual
Comprehensive technical service manual for the SEIKO Caliber Y770A digital quartz watch movement, designed for technicians and qualified service personnel. The workshop manual provides complete specifications and circuit block schematic documentation essential for understanding the movement's architecture. Detailed disassembly and reassembly procedures guide technicians through each step, supported by cleaning instructions for optimal performance restoration. The troubleshooting section covers systematic checking and adjustment procedures including battery voltage verification, circuit conductivity testing, water resistance confirmation, and LCD panel functionality assessment. Additional sections address accuracy calibration, alarm function validation, and segment display documentation with electrode mapping diagrams for LCD diagnostics. An essential reference for anyone servicing this movement.
Caliber Y800A Digital Quartz Technical Guide
Technical service manual and parts list for the Seiko Caliber Y800A digital quartz watch movement. This workshop guide covers complete specifications and circuit block schematic documentation, including trimmer adjustments and smoothing capacitors essential for proper timekeeping. Step-by-step disassembly and reassembly procedures are illustrated with numbered component diagrams to guide technicians through safe handling of delicate parts. Cleaning protocols address connector maintenance, plastic components, and other critical elements to restore movement reliability. Comprehensive checking and adjustment sections cover battery voltage verification, circuit block and liquid crystal display conductivity testing, current consumption measurement, time accuracy calibration, and switch component function validation. Includes a practical troubleshooting guide with reference table for diagnosing and resolving display failures and operational malfunctions. An essential reference for watch repair professionals and movement technicians working with digital quartz calibers.
Caliber Y961A Combination Quartz Technical Guide and Parts List
Complete technical guide and parts list for the Seiko caliber Y961A combination quartz movement, which integrates analog and digital timekeeping in a single mechanism. This service manual is an essential reference for watchmakers and technicians working with this hybrid display system. The guide begins with critical system reset procedures following battery replacement to ensure proper function of both analog hands and the liquid crystal display. Installation notes cover circuit block positioning and secure mounting. Detailed specifications explain the integrated analog dial and FEM liquid crystal panel architecture, including how the digital display coordinates with mechanical timekeeping. Complete operating instructions cover calendar, alarm, and timer functions across both display modes. Disassembly and reassembly procedures address removal and reinstallation of the case middle, rear cover, and front movement components, with specific lubrication recommendations for each stage to maintain reliable performance. The checking and adjustment section covers the relationship between circuit block structure and liquid crystal panel electrode configuration, output signal verification from the quartz oscillator, battery and circuit block conductivity testing, rate measurement against specifications, and current consumption analysis to diagnose power drain issues. Comprehensive exploded parts diagrams identify every component with callouts and part numbers, serving as the definitive reference for ordering replacements and verifying correct assembly sequence. An essential workshop manual for anyone maintaining or repairing Y961A movements.
Calibre 0680A Digital Quartz Watch Technical Data
Technical data and service manual for the Seiko Calibre 0680A digital quartz watch movement. This workshop reference provides complete specifications alongside practical repair and maintenance guidance. Covers disassembly and reassembly of case and movement components with step-by-step instructions, cleaning procedures for precision digital movements, and detailed checking and adjustment protocols. Includes battery voltage verification, accuracy testing, time-setting procedures, and LCD display segment mapping. Also documents MOS-IC output terminal connections essential for electronics troubleshooting and LCD functionality checks. A comprehensive resource for watchmakers and technicians servicing quartz digital timepieces, with all materials and instruments specified for proper after-sales service work.
Calibre V001A Combination Quartz Technical Guide and Parts List
Technical guide and parts list for the Seiko Calibre V001A combination quartz movement. Covers complete specifications, circuit block schematic, and operational functions for both analogue and digital displays. Includes detailed time setting procedures, disassembly and reassembly workflows, cleaning protocols, and comprehensive checking and adjustment routines supported by diagnostic reference tables for all functions. This service manual provides technicians with the systematic procedures needed for accurate repairs, maintenance, and calibration of this dual-display timepiece movement.
Calibre V12 Series Technical Data and Parts List
Technical data and service manual for the Seiko Calibre V12 Series solar-powered quartz movements. Comprehensive workshop reference covering V121A and V122A models with three-hand display and date window functionality. Details solar cell architecture, output voltage and conductivity measurements, capacitor performance, circuit block operation, and power consumption analysis. Provides systematic checking and adjustment procedures with calibration tables for solar cell output, capacitor conductivity, coil block performance, escapement type and jewel count specifications. Complete parts list with part numbers for all movement components and screws. Covers cleaning protocols, operational verification guidelines, movement operation, output signal characteristics, reset conditions, accuracy parameters and operational lifespan data. Includes quartz tester specifications and measurement gate requirements for precise calibration work. Essential reference for service technicians and repair shops maintaining these solar quartz calibres.
Calibre V230B Parts List
Comprehensive parts list for the Seiko Calibre V230B quartz movement, detailing all components of this single-jewel caliber. This service manual covers the complete train wheel assembly including bridge, winding stem cock, and guide pipe, along with the minute wheel, center minute wheel, hour wheel, and associated setting mechanisms. The list specifies the stepping motor components—step rotor, rotor stator, and motor connection—as well as the electronic circuit block and battery clamp required for operation. Wear items and adjustment parts include the minute wheel bridge, roller, hour wheel rings in various thicknesses to accommodate different dial configurations, fifth and fourth wheel holders, reset lever, and the jewel for step rotor. Hardware fasteners and battery specifications are included. Two distinct center minute wheel and hour wheel combinations are documented for different configuration options. Essential reference for technicians performing movement service, repair, or parts replacement on V230B-equipped timepieces.
Calibre V347A Parts List
Complete parts list for the Seiko Calibre V347A quartz watch movement, essential for service technicians and independent watchmakers performing repairs or component replacement on this widely-used caliber. Details all major assemblies including the gear train components (center wheel, pinion, fourth wheel, hour wheel, minute wheel), mechanical elements (winding stem, clutch wheel, setting lever), and electronic module parts (circuit block, coil block, rotor stator). Specifies compatible battery types across multiple manufacturers—Seiko SR920SW, Maxell SR920SW, U.C.C. 371, Sony SR920SW, and Matsushita SR920SW—ensuring correct power cell selection during service. Includes technical specifications for date dial variants accounting for crown position and calendar frame configuration differences. Provides the fastener and connector references needed for accurate reassembly. Indispensable workshop reference for maintaining or restoring Calibre V347A movements.
Calibre V53 Series Service Guide
Service and repair guide for Seiko Calibre V53 series movements, covering models V532, V533, and V537. This workshop manual provides essential technical specifications and detailed movement data for servicing these quartz watches. Includes step-by-step procedures for crown removal, hand installation, and movement operation verification using external power supply testing. Features comprehensive instructions for day-date wheel and dial disk replacement, winding stem service information, and valve diagnostics with current consumption measurements using the Seiko Digital Multi Tester S-840A. An indispensable reference for watch technicians performing repairs and routine maintenance on V53 caliber movements.
Calibre Y430A Digital Quartz Watch Technical Guide
Technical guide for the Seiko Calibre Y430A digital quartz watch module. Covers detailed specifications including the nematic liquid crystal FEM display, 32.768 Hz crystal oscillator, battery life indicator with flashing function, and dual time/calendar display with alphanumeric day and date characters. Includes comprehensive procedures for case disassembly and module extraction, button mechanism operation, liquid crystal panel handling, battery compartment access, and connector management. Diagnostic and checking procedures cover battery voltage and conductivity verification, LCD panel functional testing, switch component inspection, current consumption measurement, accuracy verification, battery life indicator validation, bulb condition assessment, and complete functional testing. Suitable for service technicians and experienced watch professionals.
Calibre Y446A Digital Quartz Technical Guide and Parts List
Comprehensive technical service manual for the Seiko Calibre Y446A digital quartz movement. This workshop guide delivers the depth needed for professional repair and maintenance of this precision timepiece module. Detailed specifications cover the 29.5 mm case diameter, 5.2 mm height profile, and the 32.768 Hz crystal oscillator that governs timekeeping accuracy across the -10°C to +60°C operating range. Step-by-step case disassembly and reassembly procedures detail proper silicon grease application at critical wear points to ensure smooth operation and longevity. The manual includes full module disassembly and cleaning protocols essential for restoring function after service. Verification and adjustment sections address every critical parameter: battery voltage, liquid crystal panel conductivity, bulb illumination condition, speaker block function, switch response, current consumption, and rate accuracy. Liquid crystal panel segment electrode diagrams for both Y446A and Y458A variants provide the visual reference needed to diagnose display faults. A complete module parts list with individual part numbers enables rapid identification and sourcing of replacement components. This is the authoritative reference for anyone servicing or rebuilding this movement.
Calibre Y476A Digital Quartz Technical Guide and Parts List
Complete technical guide and parts list for the Seiko Calibre Y476A digital quartz watch movement. This workshop manual covers the full specifications of this 18.7mm diameter movement, including the 32.768 Hz crystal oscillator and nematic liquid crystal FEM display architecture. The service manual provides circuit block schematics detailing the speaker drive transistor, segment electrode configuration, and trimmer condenser tuning elements. Includes detailed disassembly and reassembly diagrams with full exploded views of all internal components for technicians performing maintenance or repair work. Covers cleaning procedures, battery voltage checking, liquid crystal panel inspection, circuit block connection verification, current consumption measurement, accuracy testing, functional operation checks, switch component inspection, and speaker block adjustment. Specifies the required 1.55V silver oxide battery (Toshiba WG-3 or SR41W equivalent). An essential reference for watch repair professionals and service technicians working with this movement.
Calibre Y480B Parts List
Parts list for the Seiko Calibre Y480B quartz watch movement, providing a complete technical breakdown of every component, subassembly, and fastener. This document catalogs all numbered part references essential for disassembly, repair, reassembly, and parts sourcing, including the auxiliary plate, train wheel bridge, center wheel and pinion units, hour wheel mechanism, winding stem, circuit block screws, friction washers, switch lever, step rotor jewels, battery contacts, and all associated hardware. The list details three center wheel and pinion variant configurations (types a, b, and c) so you can identify and source the correct assembly for your specific movement, along with winding stem options and train wheel bridge specifications for Pulsar-branded models. Battery compatibility is documented for both Maxell SR621SW and Seiko SG621SW cells. Ideal for watchmakers, technicians, and experienced hobbyists performing movement service, replacement parts identification, or restoration work on Seiko Y480B equipped timepieces.
Calibre Y482C Service Guide - Technical Data and Specifications
Complete Seiko Calibre Y482C service manual covering technical specifications and maintenance data for this quartz watch movement. The movement features 2-hand time indication and a step motor with load-compensated driving pulse design. Key dimensions: 18.4 mm (6h–12h) × 18.4 mm (3h–9h) × 16.3 mm height; case diameter 17.8 mm, overall height 2.8 mm including battery. Compatible battery options include SEIKO TR215W, MAXELL SR215W, and SONY SR215W. Accuracy specification shows monthly rate loss under 20 seconds across the normal operating temperature range. The movement contains zero jewels. Documentation includes comparative notes on the Y482A calibre, particularly the removal of the reset lever and train wheel setting lever. Essential troubleshooting and repair reference for technicians servicing Seiko Y482C movements.
Calibre Y551A, Y552A, Y553A Technical Guide - Analogue Quartz
Technical service manual for Seiko Calibre Y551A, Y552A, and Y553A analogue quartz movements. This workshop reference provides complete specifications for all three caliber variants: crystal oscillator frequency of 32.768 kHz, case diameter Ø23.3 mm, movement height 3.3–3.9 mm, and 5 jewels. The guide covers time and calendar setting procedures with precise crown positions required for accurate adjustment. A comprehensive checking and adjustment table helps technicians verify critical parameters. Detailed troubleshooting and testing sections address battery voltage, circuit block conductivity, coil block inspection, output signal verification, second hand setting conditions, accuracy checks, gear train inspection, and current consumption measurement. Technical diagrams and component identification layouts support complete understanding of movement assembly. Essential repair and maintenance reference for watchmakers servicing these popular Seiko quartz movements.
Calibre Y557, Y558, Y559 Technical Guide and Parts List
Complete technical guide and parts list for Seiko Calibre Y557, Y558, and Y559 analogue quartz movements. This workshop manual covers movement specifications, time and calendar setting procedures, and detailed disassembly and reassembly instructions for the calendar mechanism, circuit block, coil block, and gear train. Includes step-by-step lubrication procedures and cleaning protocols specific to electronic components. Features comprehensive checking and adjustment procedures for output signal verification, battery voltage and conductivity testing, circuit block and coil block diagnostics, accuracy calibration, and gear train performance. Contains detailed technical illustrations and exploded views of movement components, along with a complete schematic of the calendar correction mechanism. Essential service manual for watchmakers and technicians working with these quartz calibres.
Calibre Y591A Analogue Quartz Technical Guide
Technical service manual and parts list for Seiko Calibre Y591A analogue quartz watch movement. This workshop guide provides everything needed for movement maintenance, troubleshooting, and repair. Includes detailed specifications and circuit block schematic to understand the movement's architecture. Covers complete disassembly and reassembly procedures, from winding stem removal through full reconstruction. Cleaning instructions ensure proper restoration of internal components. Extensive adjustment and checking procedures address output signal verification, battery voltage testing, circuit block and coil block conductivity checks, current consumption measurement, and reset and second setting condition verification. Complete parts list with individual component references and train wheel variations supports accurate identification and sourcing of replacement parts.
Calibre Y666A Digital Quartz Technical Guide
Technical service manual for the Seiko Calibre Y666A digital quartz movement. This workshop reference covers complete mechanical and electrical specifications—movement diameter 28.0 mm, height 4.9 mm—along with the Nematic Liquid Crystal FEM display architecture and the C-MOS-LSI quartz oscillator circuit schematic. Provides practical lubrication reference data, systematic checking and adjustment procedures for technicians, and detailed liquid crystal panel testing methods. Includes current consumption measurements under various operating conditions and functional calibration steps for time display, alarm display, stopwatch modes, and integrated game function. Powered by a Sanyo CR2016 lithium battery rated at 3.0 V with typical service life of approximately three years. Essential troubleshooting and maintenance resource for watchmakers and repair specialists working with this Seiko quartz caliber.
Calibre Y702A Digital Quartz Technical Guide
Technical service manual for the Seiko Calibre Y702A digital quartz movement, essential reference documentation for watchmakers and service technicians. Provides complete specifications alongside systematic disassembly and reassembly procedures for case and module components. Covers glass replacement methods, thorough cleaning protocols, and comprehensive checking and adjustment workflows. Includes detailed segment mapping for liquid crystal panel electrodes, repair procedures for battery electrolyte leakage, current consumption measurement techniques, timekeeping accuracy calibration, and switch spring function verification. Designed to support precise diagnostics and restoration of Y702A movements in workshop and service environments.
Calibre Y716A Digital Quartz Technical Guide and Parts List
Technical service manual and parts list for the Seiko Calibre Y716A digital quartz movement. This workshop guide covers complete module specifications and detailed display functions including time, timer, and alarm operation. The disassembly and reassembly section walks technicians through case and module separation, with proper lubrication points identified throughout. Comprehensive checking and adjustment procedures cover battery voltage and conductivity testing, water resistance verification, liquid crystal panel contact inspection, accuracy calibration, alarm function testing, and switch conductivity checks. Circuit block structure diagrams illustrate the electronic architecture and segment electrode relationships for LCD functionality. The complete parts list provides replacement references for all components, making this an essential troubleshooting and repair reference for technicians servicing this quartz movement.
Calibre Y760A Digital Quartz Service Manual and Parts List
Complete service manual for the Seiko Calibre Y760A digital quartz movement. Provides full technical specifications and circuit block schematics essential for authorized service work. Details the piezoelectric speaker system design and operation. Covers step-by-step disassembly and reassembly of the case and module assembly, with specific lubrication points and compound specifications to ensure proper reassembly. Includes cleaning protocols for individual components to maintain accuracy and reliability. Extensive checking and adjustment procedures address battery voltage verification, conductivity testing, current consumption measurement, water resistance validation, liquid crystal display contact verification, rate accuracy checking, and functional testing across all display modes and functions. Comprehensive parts list with manufacturer identification codes for ordering replacements. An essential technical reference for watch repair technicians and authorized service centers working with this quartz caliber.
Casio Y665A Digital Quartz Technical Guide and Parts List
Comprehensive service manual for the Casio Y665A digital quartz watch. This workshop guide covers full technical specifications, complete circuit schematic documentation, step-by-step disassembly and reassembly procedures for both case and movement, detailed cleaning protocols, systematic checking and adjustment procedures with integrated troubleshooting flowchart, and an exhaustive parts list with original part numbers. An essential reference for watch technicians and repair professionals maintaining or restoring this model.
Casio Y735A Digital Quartz Technical Guide and Parts List
Complete technical service manual for the Casio Y735A digital quartz watch. This workshop guide delivers everything needed for professional repair, maintenance, and parts replacement—from initial inspection through final adjustment. Includes full specifications, circuit block schematic, and detailed breakdown of all display functions: time and calendar modes, calculator, alarm with test system, numerical memory storage, and stopwatch with automatic return. Step-by-step disassembly and reassembly procedures cover both case and module removal with precision. Comprehensive cleaning instructions ensure proper maintenance of nematic liquid crystal FEM display components. Extensive checking and adjustment sections incorporate a complete troubleshooting flowchart for systematic diagnostics. Technical specifications detail the 3.0V lithium battery (approximately 3 years operating life) and integrated mechanisms including hourly time signal functionality. Illustrated parts list provides clear identification of every component for accurate ordering and replacement.
Casio Y739A Digital Quartz Technical Guide and Parts List
Complete technical guide and parts list for the Casio Y739A digital quartz watch—an essential service manual for authorized repair technicians and experienced watchmakers. Covers all critical aspects of watch servicing: detailed specifications, circuit block schematics for both front and back assembly, display operation and key function reference, time-setting procedures, and built-in calculator mode instructions. Includes step-by-step disassembly and reassembly protocols for the case and movement module, with precise lubrication point mapping and required specifications. Provides glass and keyboard replacement guidance with proper alignment techniques, comprehensive checking and adjustment procedures supported by a practical troubleshooting flowchart for diagnosing common issues. Addresses battery maintenance and installation, water resistance testing methodology, liquid crystal panel inspection protocols, circuit block verification steps, accuracy adjustment calibration, and keyboard conductivity verification. Detailed technical illustrations of internal components, mechanical assemblies, and systematic reassembly sequences ensure correct servicing outcomes. Ideal for workshop reference or as a downloadable PDF for technicians performing maintenance, repairs, or module replacement on this model.
Citizen Y100A Y101A Parts List
Parts list for Citizen Y100A and Y101A watch movements, covering all components essential for assembly, maintenance, and repair of these calibers. Includes the train wheel bridge, center wheel and pinion, third wheel and pinion, fourth wheel and pinion, minute wheel, hour wheel, setting wheel, clutch wheel, winding stem, setting lever and spring, secondary setting lever, dial washer, fifth wheel and pinion, escape wheel, coil block, step rotor, rotor stator, battery connections, screws, jewels, and battery tubes and connectors. Each caliber is offered with two distinct center minute wheel and hour wheel combinations to accommodate different design configurations. This comprehensive parts reference serves as an essential repair manual supplement for technicians servicing these quartz movements.
Citizen Y643A Y642A Analogue Quartz Technical Guide
Technical guide and comprehensive parts list for Citizen Y643A and Y642A analogue quartz watches. This workshop manual covers complete specifications, circuit schematic diagrams, step-by-step disassembly and reassembly procedures with detailed lubricant application guidelines, calendar and setting mechanism operation, cleaning protocols, and systematic checking and adjustment procedures essential for service and repair. Includes parts reference numbers and component variations for accurate restoration and maintenance.
Citizen Y729A Digital Quartz Technical Guide and Parts List
Technical service manual and parts list for the Citizen Y729A digital quartz watch. Provides complete specifications alongside detailed disassembly and reassembly procedures illustrated with exploded views. Covers lubrication techniques, battery checking and adjustment, LCD display segment verification, liquid crystal panel service, circuit block diagnostics, current consumption measurement, accuracy testing, bulb inspection, and switch component maintenance. Includes organized component breakdown with factory part numbers and step-by-step replacement instructions for all serviceable elements.
Citizen Y780A/Y786A/Y789A Digital Quartz Technical Guide
Technical service manual and parts list for Citizen digital quartz watch models Y780A, Y786A, and Y789A. Provides complete specifications, circuit block schematic, and display function reference. Covers full disassembly and reassembly procedures for both module and case components, along with detailed cleaning instructions. Includes systematic checking and adjustment procedures supported by a troubleshooting flowchart for rapid diagnosis. Technical sections address battery voltage measurement, conductivity testing, water resistance verification, liquid crystal display contact inspection, accuracy calibration, operational function testing, switch component inspection, indicator bulb assessment, and alarm mechanism verification. Essential reference for technicians performing service, maintenance, and repair work on these quartz models.
Citizen Y816A Y819A Digital Quartz Technical Guide
Technical service manual for Citizen Y816A and Y819A digital quartz watches. Covers detailed specifications, circuit schematics, and step-by-step disassembly and reassembly procedures with full illustrated diagrams. Includes comprehensive cleaning instructions, checking and adjustment procedures with precise testing methods, battery specifications and replacement guidance, and component identification for accurate parts reference. Essential workshop manual for service technicians performing repairs, maintenance, and calibration on these models.
Credor Cal. 4S77A Movement - Parts Catalogue and Technical Guide
Complete parts catalogue and technical workshop guide for the Seiko Credor Cal. 4S77A automatic movement. This service manual provides detailed specifications, exploded diagrams with numbered part identification, step-by-step disassembly and reassembly procedures, hand installation instructions, calendar mechanism setting positions, and comprehensive component lists covering jewels, screws, and pins. The movement operates at 28,800 vibrations per hour with 28 jewels and dual calendar display showing both date and day of week. An essential reference for watchmakers and technicians servicing this precision automatic caliber.
Digital Quartz Technical Guide and Parts List Y750A Y756A Y759A
Technical service manual and comprehensive parts list for Seiko digital quartz watch movements, covering Calibre Y750A (Y740A), Y756A (Y746A), and Y759A (Y749A). Provides complete specifications, circuit block schematic diagram, and piezoelectric speaker design details. Covers all display functions, step-by-step disassembly and reassembly procedures with proper lubrication and cleaning techniques. Includes systematic checking and adjustment guidance with integrated troubleshooting flowchart, component conductivity verification methods, accuracy testing and calibration protocols, battery and bulb testing procedures, and a detailed parts listing with full component reference numbers for ordering and identification.
Hattori Seiko Cal. 3L12A, 3L14A, 3L19A Parts Catalogue and Technical Guide
Complete parts catalogue and technical service guide for Seiko Cal. 3L12A, 3L14A, and 3L19A quartz watch movements. This workshop manual provides detailed specifications, fully annotated exploded diagrams with individually numbered components, step-by-step disassembly and reassembly procedures, and precise lubrication protocols. Covers circuit block architecture, battery installation and positioning, train wheel bridge alignment, electrical value verification, stepper motor drive system operation, and date calendar mechanism. Includes component identification and function for all circuit block sections. Essential reference for watch technicians and repair professionals working with these three Seiko movement calibers.
Hattori Seiko Cal. 5E29A Parts Catalogue and Technical Guide
Comprehensive parts catalogue and technical service manual for the Seiko Cal. 5E29A quartz watch movement. This workshop reference covers the complete 23.0 mm diameter step-motor-driven movement with full disassembly and reassembly procedures, detailing all 33 components in an exploded parts diagram. Includes precise lubrication instructions, train wheel bridge positioning guides, and technical specifications essential for accurate servicing. Features detailed information on dial variants (part numbers 801 959, 801 958, 801 957, 878 511), holding ring assembly, winding stem design, and battery specifications (SEIKO SR716SW or Matsushita SR716SW, 1.55V, 3-year service life). A must-have reference for watchmakers and horologists working with this popular quartz caliber.
Hattori Seiko Cal. 7454A Parts Catalogue
Parts catalogue for the Hattori Seiko Cal. 7454A quartz watch movement, featuring a moon phase indicator and date complication. The manual provides exploded views of the complete movement assembly, detailing the hour, minute, and second hands, dial, moon phase unit, date function components, wheels, and jeweled bearings. Each component is identified with its part number, and the catalogue includes assembly guidance for critical subassemblies: the battery contact block, coil block, circuit block, stepper motor rotor, and clutch mechanism. Essential reference for anyone servicing or restoring this movement, offering the precise component identification needed for accurate parts sourcing and reassembly.
Hattori Seiko Cal. 8M25A 8M25B Parts Catalogue
Hattori Seiko Cal. 8M25A and 8M25B quartz movement parts catalogue and technical service manual. Provides complete specifications for both calibers, exploded component diagrams, step-by-step disassembly and reassembly procedures, and lubrication guidelines for proper maintenance. Covers detailed technical remarks on the mode indicator design, circuit block architecture, battery installation protocols, and functional elements specific to each caliber. Highlights the key engineering differences between the 8M25A and 8M25B, including distinct mode indicator configurations and switch spring specifications. An essential repair and maintenance reference for watchmakers and technicians servicing these Seiko quartz movements.
Hattori Seiko Cal. D410A Parts Catalogue and Technical Guide
Parts catalogue and technical guide for the Seiko Cal. D410A digital watch module. This service manual contains detailed specifications and exploded views covering the case back, gasket, conducting plate, module, buttons, battery components, circuit block, and liquid crystal panel assembly. The technical sections walk through circuit block structure, segment-electrode relationships, and step-by-step disassembly and reassembly procedures. Also included are battery installation guidelines, resistance measurements for the upconverter coil, time accuracy verification, and current consumption testing parameters—everything a technician needs for module repair, maintenance, or replacement work on this classic digital watch caliber.
Hattori Seiko Cal. V 692A Parts Catalogue/Technical Guide
Complete parts catalogue and technical service guide for the Seiko Cal. V 692A quartz watch movement. Provides detailed specifications, illustrated parts diagrams with numbered components, step-by-step disassembly and reassembly procedures, circuit block structure overview, and battery installation instructions. Covers the 24mm watch case configuration with 2 hands and mode indicator, stepping motor drive system, electronic circuit reset switch with 60-minute reset capability, and typical battery life of approximately 2.5 years using SEIKO SR920W, Maxell SR920W, or SONY SR920W cells. Includes technical guidance on proper disassembly methodology and careful component handling to ensure reliable movement operation and longevity.
Hattori Seiko Cal. V33FA V33GA Parts Catalogue Technical Guide
Parts catalogue and technical guide for Hattori Seiko calendar watch movements Cal. V33FA and V33GA. This comprehensive service manual covers complete specifications for both movement types, detailed disassembly and reassembly procedures essential for workshop repair, exploded parts diagrams with individually numbered components for precise identification, hand installation instructions, calendar wheel positioning and synchronization, lubrication specifications for optimal movement performance, and electrical value checking procedures. An indispensable reference for watchmakers and technicians servicing these quartz calendar movements.
Hattori Seiko Cal. V400A V401A Parts Catalogue & Technical Guide
Hattori Seiko caliber V400A and V401A quartz movement parts catalogue and technical guide. Covers complete specifications for both 2 and 3-hand configurations, step motor drive systems, and battery types. Includes detailed parts identification diagrams, circuit block structure, train wheel bridge positioning, main plate lubrication protocols, and component specifications. Features numbered parts diagrams identifying every component with technical references. An essential workshop reference for technicians servicing these Seiko quartz movements.
Hattori Seiko Cal. W306A Parts Catalogue & Technical Guide
Parts catalogue and technical guide for the Hattori Seiko Cal. W306A digital watch module. This repair manual provides specifications, detailed disassembled parts diagrams with component identification, circuit block structure schematics, and segment electrode designations essential for service work. Includes battery installation procedures, value checking parameters for diagnostics, and comprehensive exploded views with technical remarks guiding disassembly and reassembly. A practical reference for watchmakers and technicians working on this quartz digital movement.
Hattori Seiko Cal.2A24A Parts Catalogue
Parts catalogue for the Seiko Cal.2A24A quartz watch movement. This technical reference provides exploded view diagrams showing the complete movement assembly, moon phase indicator unit, wheel train components, and clutch mechanism in precise detail. A comprehensive parts list cross-references every component by number — hands, dial, moon phase indicator, wheels, pinions, levers, and screws — making identification and sourcing straightforward for technicians and watchmakers. Battery specification (SEIKO TR621SW) is clearly noted, and the mechanical assembly layout diagram serves as an essential guide for movement disassembly and reassembly. An indispensable service reference for anyone maintaining or repairing this Cal.2A24A movement.
Hattori Seiko V336A Movement Parts Catalogue and Technical Guide
Hattori Seiko V336A quartz watch movement parts catalogue and technical service guide. Complete reference for watchmakers and technicians working with this 24.0 mm diameter step motor movement. Covers full parts identification with numbered component diagrams, detailed assembly and disassembly procedures for hands and calendar mechanism, precise setting instructions for date and day jumpers, and electronic circuit calibration. Includes calendar and day-date complication with electronic reset functionality. Battery life rated at approximately 3 years. Essential workshop documentation for V336A movement service, repair, and periodic maintenance.
Hattori Seiko V803A Movement - Parts Catalog & Technical Guide
Complete parts catalog and technical guide for the Hattori Seiko V803A quartz watch movement. This service manual provides detailed specifications for the 3-hand dial configuration, 18.4mm case diameter, and 2.5mm movement height, along with step-motor driving system architecture. Disassembly and reassembly procedures are illustrated across 33 numbered exploded views, supported by a comprehensive parts list with factory reference numbers for accurate component identification and ordering. Lubrication specifications detail the use of Moebius A and SEIKO Watch Oil S6 for proper movement maintenance. Battery information covers compatible types including SR621SW and SR215W cells rated at 1.68V with typical 2-year service life. The guide includes a circuit block structure diagram for understanding electrical architecture, value-checking procedures for coil block resistance (2.3–2.7kΩ tolerance) and current consumption verification (less than 1.2µA under load), plus practical notes on winding stem removal, train wheel setting lever positioning, and train wheel bridge assembly techniques essential for successful service work.
Hattori Seiko V896A Calendar Watch Parts Catalogue and Technical Guide
Complete parts catalogue and technical service guide for the Seiko V896A calendar watch movement. This workshop manual provides everything needed for professional maintenance and repair, including detailed component specifications, numbered parts diagrams with exploded views, step-by-step disassembly and reassembly procedures, adjustment and setting instructions, lubrication specifications for each assembly point, and battery data. The technical section covers the step motor drive system architecture, numerical date calendar mechanism operation, circuit block layout and structure, and precision measurement parameters essential for accurate calibration and troubleshooting.
Hattori Seiko V899A Parts Catalogue and Technical Guide
Comprehensive parts catalogue and technical service guide for the Seiko V899A quartz watch movement. This workshop manual provides everything needed for professional repair and maintenance of this 17.6mm diameter, 2.6mm height movement. Detailed specifications cover the 2-hand time display with integrated date calendar function. The guide includes a fully annotated parts diagram with individually numbered components, making identification straightforward during disassembly and reassembly work. Step-by-step procedures walk through both taking apart and rebuilding the movement safely. Battery replacement guidance covers all compatible cells: SEIKO SR621SW, Maxell SR621SW, SONY SR621SW, and Eveready 364. Lubrication specifications clearly identify the correct oils for different bearing surfaces—Moebius A and SEIKO Watch Oil S-6—essential for reliable timekeeping after service. The circuit block structure section explains the electronic architecture, while value checking procedures establish proper testing parameters including coil block resistance limits (2.7kΩ–4.1kΩ range) and current consumption specifications for troubleshooting and verification. Indispensable reference for watch technicians servicing this movement.
Lassale Cal. 2E50A Quartz Parts Catalogue
Seiko Lassale quartz watch parts catalogue for calibre 2E50A. This comprehensive parts list features detailed illustrated component breakdowns with part numbers and exploded assembly views of the complete movement. Essential reference for watchmakers, service technicians, and anyone performing maintenance or repair work on this specific calibre. Includes precise part identification and assembly relationships to facilitate accurate ordering and troubleshooting. Technical documentation in PDF format for easy access and reference during service operations.
Lassale Quartz Cal. 2A52A Parts Catalogue
Comprehensive parts catalogue and identification guide for the Seiko Lassale Quartz Cal. 2A52A watch movement. This parts list provides numbered references for all internal components including train wheels, pinions, escapement assembly parts, dial components, integrated circuit block, rotor and stator elements, battery contact points, fasteners, and tubes. An essential reference for watchmakers and technicians performing service, repair, or reassembly work on this quartz movement.
Lassale Seiko Cal. 1231A Quartz Watch Parts Catalogue
Parts catalogue for the Seiko Lassale Cal. 1231A quartz watch movement. This detailed illustrated parts list identifies every component by part number and provides the technical specifications that define this caliber: 32,768 Hz tuning fork frequency, step motor drive, and trimmer condenser regulation system for accurate timekeeping. The catalogue documents combination variants for the fourth wheel and pinion assembly, center minute wheel, and hour wheel, showing two complete type configurations with technical drawings to clarify assembly relationships and interchangeable options. Essential reference for service technicians, repair specialists, and watchmakers working with this popular quartz caliber.
Lassale Seiko Cal. 1E50A Parts Catalog
Parts catalog for the Seiko Lassale Cal. 1E50A quartz watch movement. This illustrated parts list provides complete part numbers for all movement components, including jewels, wheels, springs, motor assemblies, and battery contact elements. An essential reference for technicians servicing or repairing this Seiko quartz movement, whether performing routine maintenance or sourcing replacement parts for restoration work.
Lassale Seiko Cal. 2F50A Quartz Parts Catalogue
Parts catalogue for the Seiko Lassale Cal. 2F50A quartz movement. This service manual provides detailed illustrated parts diagrams with complete part numbers for all components in this quartz timepiece movement, making it essential reference material for watch technicians performing repair, maintenance, and assembly work on this model.
Lassale Seiko Quartz Cal. 2F50A Parts List
Parts list for the Seiko Lassale quartz movement Cal. 2F50A, providing a complete illustrated catalogue of numbered components and reference identifiers for all mechanical and electronic elements. This technical reference is essential for watchmakers and technicians who need to identify, source, or replace specific parts during repair and maintenance. The list is organized with clear diagrams and part numbers for efficient cross-reference.
Lassale Seiko Quartz Cal. 5A50A, 5A54A Parts List
Parts list and exploded diagrams for Lassale Seiko quartz watches with caliber 5A50A and 5A54A movements. This manual provides detailed part numbers for every component and subassembly, essential for ordering replacement parts, performing repairs, or servicing these models. Technicians and watchmakers will find the comprehensive breakdowns invaluable for identifying correct parts during disassembly and reassembly work.
Parts Catalogue and Technical Guide Cal. 3E22A, 3E23A, 3E29A, 3E32A, 3E39A
Complete parts catalogue and technical reference guide for Seiko quartz watch movements across five caliber variants: 3E22A, 3E23A, 3E29A, 3E32A, and 3E39A. This workshop manual provides watchmakers and technicians with detailed movement specifications including precise dimensions (Ø17.6mm to Ø19.8mm, 2.5–2.8mm height), hand configurations spanning 2 to 3 hands, and functional features such as instant calendar mechanism, gear train assembly, electronic reset switch, and battery life indicator systems. The service manual includes a fully illustrated parts list with 38 individually numbered components shown in exploded-view diagrams for accurate identification and ordering. Lubrication data specifies approved oils (Moebius A and Seiko Watch Oil S6) for proper movement maintenance. References to disassembly and reassembly procedures support both routine maintenance and repair work. Essential reference material for anyone servicing or restoring these quartz calibers.
Parts Catalogue and Technical Guide for Cal. 5P22A, 5P23A, 5P29A
Official parts catalogue and technical guide for Seiko quartz watch movements Cal. 5P22A, 5P23A, and 5P29A. This service manual provides comprehensive specifications, exploded diagrams with individually numbered components, and step-by-step disassembly and reassembly procedures essential for repair and maintenance work. Includes detailed lubrication instructions, circuit block structure diagrams, valve checking procedures, and complete component lists. Battery specifications and technical remarks on parts variations are documented throughout to guide accurate servicing and component replacement.
Parts Catalogue and Technical Guide for Seiko Cal. 5Y22A, 5Y23A, 5Y30A, 5Y31A, 5Y32A, 5Y39A
Complete parts catalogue and technical guide for Seiko quartz watch movements Cal. 5Y22A, 5Y23A, 5Y30A, 5Y31A, 5Y32A, and 5Y39A. This workshop manual covers step-motor driven movements with calendar functions and multiple caliber variants. Includes detailed exploded view diagrams showing each component in position, comprehensive specifications table detailing movement dimensions and functional features, organized parts lists with individual component numbers for ordering and identification, and systematic assembly and disassembly procedures for service and repair work. Lubrication instructions specify the correct greasing points and products for optimal timekeeping performance. Circuit block structure analysis and complete electrical specifications support troubleshooting and technical diagnostics. An essential reference for watch technicians and repair professionals working with these Seiko quartz calibers.
Pulsar CAL. V091 Duo-Display Quartz Technical Data
Technical specifications and comprehensive user guide for the Pulsar CAL. V091 duo-display quartz watch. This service manual covers the complete feature set including analogue and digital time display, calendar function, 100-hour stopwatch with lap time signal capability, memory recall, countdown timer, five-channel daily alarm system, and electroluminescent illumination for low-light visibility. Detailed operating instructions for display navigation and mode selection ensure users can access all functions effectively. An essential owner's manual and troubleshooting reference for this hybrid analog-digital timepiece.
Pulsar Quartz Cal. Y432A Technical Guide
Technical service manual for the Pulsar Quartz Cal. Y432A analogue quartz wristwatch, essential for horologists and repair technicians working with this movement. Provides complete specifications and detailed disassembly and reassembly instructions using the movement holder S-664. Includes the full electronic circuit diagram, gear train layout, and setting mechanism schematics. Covers practical cleaning methods for the main plate, step rotor, and plastic components. Offers step-by-step procedures for verification and adjustment, including output signal measurement, battery voltage and conductivity testing, circuit block diagnosis, and precision timekeeping adjustments. This workshop manual serves as the authoritative technical reference for maintenance and repair of the Y432A calibre.
Quartz Cal. Y433A Technical Guide
Technical service guide for the Seiko Quartz Cal. Y433A movement. This comprehensive workshop manual provides everything needed for professional maintenance and repair of this quartz caliber, from initial teardown through complete reassembly. Detailed specifications establish baseline references for all subsequent work. The disassembly and reassembly procedures walk through the calendar mechanism, electronic circuit, and gear train step-by-step, ensuring nothing is missed during service. Lubrication instructions specify exact points and methods to keep the movement running smoothly, while cleaning protocols ensure all components are properly restored. The troubleshooting guide helps diagnose common issues quickly. Adjustment and checking procedures cover battery voltage verification, circuit block conductivity testing, reset and second-hand setting conditions, coil block inspection, and accuracy calibration including time regulation. A complete parts list with numbered component references and exploded movement views makes identification and ordering straightforward. An essential reference for watchmakers and service technicians working with this caliber.
Seiko 1100A Caliber Technical Data - Train Wheel and Setting Mechanism
Technical service documentation for the Seiko 1100A caliber movement, covering the train wheel assembly and setting mechanism with detailed parts identification. This workshop manual presents exploded diagrams of critical components, complete with numbered references for precision repair and assembly work. Includes comprehensive lubrication specifications detailing exact application points and approved oils—Moebius Synt-A-Lube and Seiko Watch Oil 5-4—essential for proper movement maintenance. Movement dimensions: 15.15mm × 13.00mm case diameter, 3.66mm height, operating at 21,600 vibrations per hour (6 beats per second). Ideal for horologists and watchmakers performing service, restoration, or maintenance on this caliber.
Seiko 1104A Technical Data and Parts List - 17j / 21j Calibre
Technical specifications and comprehensive parts list for the Seiko calibre 1104A mechanical watch movement, covering both 17-jewel and 21-jewel variants. This service manual provides precise technical data including movement dimensions (15.15 × 13.00 mm case, 4.30 mm maximum height), frequency (21,600 vibrations per hour), manual-wind operation with sweep second hand, and Diaashock shock resistance. The parts list is organized by assembly with complete part numbers and component descriptions. Exploded diagrams detail the barrel bridge, train-wheel bridge, ratchet wheel, escape wheel, and related subassemblies—essential reference material for technicians performing maintenance, repair, or parts identification on these movements.
Seiko 1520B Fine Seiko - Technical Parts List
Technical parts list and service manual for Seiko 1520B Fine Seiko calibre watches (calibres 23J and 17J). This comprehensive parts catalog provides detailed part numbers and specifications for all movement components essential to repair, maintenance, and assembly work. Coverage includes barrel and train-wheel bridge, pallet cock, balance cock, complete barrel assembly with arbor and jewel settings, barrel arbor, wheels and pinions, escape wheel, balance staff, regulator assembly, setting lever, yoke, mainspring, end-pieces, Diafix jewels, and Diastock frame components, plus all associated screws and fasteners. Two-page reference with technical specifications: case dimensions 19.80 × 9.60 mm, height 3.50 mm, and frequency rating of 19,800 vibrations per hour. An essential workshop resource for watchmakers and technicians performing calibre servicing, repairs, or complete movement overhauls.
Seiko 15A Lady Seiko - Parts List and Exploded Views
Parts list and exploded component views for the Seiko 15A Lady Seiko non-automatic wristwatch. This service manual documents the complete mechanical assembly of the 15A caliber, with case dimensions 19.80 x 9.60 mm and maximum height 3.50 mm operating at 19,800 vibrations per hour. The repair guide covers every component from the mainspring and barrel through the train wheel assembly (center wheel with pinion, third wheel, minute wheel, escape wheel), escapement mechanism (jeweled pallet fork, balance cock, roller table, balance staff), and regulation system. Also included are the crown wheel and winding stem assembly, clutch wheel, setting wheel, and all associated jewel settings—both Diashock upper and lower frames and Diafix hole jewels with their retaining springs. Detailed exploded views show the precise positioning and relationship of each part, making this parts list essential for anyone servicing or restoring this classic Lady Seiko caliber. The workshop manual format with component diagrams ensures correct identification and reassembly of every screw, jewel setting, and mechanical element.
Seiko 1E20A Quartz Movement Parts Catalogue
Seiko 1E20A quartz movement parts catalogue covering complete technical specifications and component breakdown for this precision timepiece mechanism. Documents the 8.5mm casing diameter, 2.6mm maximum height, 5-jewel construction, 32.768 Hz crystal oscillator frequency, and dual-pole step motor with rotary step switch regulation system. The catalogue provides exploded views and a comprehensive parts list with individual reference numbers for every component: train wheel bridge, center wheel and pinion assembly, hour wheel, third and fourth wheels, minute wheel, clutch wheel, winding stem, setting lever, yoke, dial washer, circuit block, coil block, step rotor, insulators, battery contact configuration, rotor stator arrangement, rotary step switch mechanism, jewel placements, fasteners (screws and pins), tubes, and compatible battery types (Maxell SR512SW and Seiko SR512SW). Essential reference material for service technicians, movement specialists, and watchmakers requiring detailed component identification and assembly information for repair, maintenance, or restoration work on this movement variant.
Seiko 1F20A Movement Parts Catalogue and Technical Guide
Seiko 1F20A Movement Parts Catalogue and Technical Guide — Complete service reference for the Seiko 1F20A quartz movement. This workshop manual provides detailed specifications and exploded diagrams of all movement components with corresponding parts numbering for accurate identification and sourcing. The guide covers full disassembly and reassembly procedures, step-by-step lubrication instructions to maintain precision timekeeping, circuit block architecture, and valve checking parameters essential for quality control and repair work. Movement specifications: 12.5mm outside diameter, step motor driving system, electronic circuit reset switch, monthly rate under 15 seconds, powered by Maxell SR416SW battery (1.55V, 3-year service life), 0 jewel configuration, 2-hand layout. An indispensable technical reference for watch technicians and repair professionals working with this caliber.
Seiko 2104B Chorus - Parts List and Technical Data
Parts list and technical data for the Seiko caliber 2104B manual-wind movement (17 jewels, Chorus style). This comprehensive parts catalog provides detailed component identification with factory part numbers, essential casing dimensions (17.80 × 15.30 mm, maximum height 4.40 mm), operating vibration rate of 19,800 per hour, and complete parts breakdown. The 2104B is a non-automatic movement fitted with a sweep second hand and Diashock shock-resistant protection, making this reference essential for technicians servicing this caliber.
Seiko 2202A Calendar Watch Parts List and Technical Data
Technical parts list and service reference for the Seiko 2202A calendar watch movement — a 17.20mm diameter automatic mechanism rated at 28,800 vibrations per hour with 21 jewels. This manual provides the complete parts catalog with individual part numbers, exploded assembly diagrams showing the precise layout of all mechanical components, and detailed specifications for date dial configuration. Includes a selection guide for three different setting lever types to match your specific movement variant, plus technical drawings of the calendar correction mechanism and date driving system. Essential for watchmakers performing maintenance, repair, or full reassembly of the 2202A movement, or for anyone needing to identify individual components by reference number.
Seiko 2205A Automatic Watch Movement Technical Data and Parts List
Seiko 2205A Automatic Watch Movement — Technical Data and Complete Parts List. This service manual provides full technical specifications for the Seiko 2205A caliber: 17.20mm case diameter, 5.65mm height, 28,800 vibrations per hour, and 17 jewels. The document includes a comprehensive parts breakdown with exploded view diagrams identifying every component, part number, and material composition. Technical notes cover winding stem variants, click spring alternatives, setting lever configurations, friction spring options, rocking seat designs, and date dial specifications with precise caliber positioning details. An essential reference for watchmakers performing maintenance, repair, or complete overhauls of this movement.
Seiko 2206A Calendar Watch Movement Technical Data and Parts List
Technical data sheet for the Seiko 2206A 17-jewel automatic watch movement, a reliable calendar mechanism with day and date display. Covers detailed specifications (diameter 7.80×7.00 mm, height 5.85 mm, frequency 26,600 vibrations per hour) alongside a comprehensive parts list with technical drawings of each component. Includes mechanism diagrams that break down the calendar system, setting lever, date finger, and date driving wheel assembly. The documentation illustrates the instant setting device for synchronized day and date adjustment, with a crown positioning reference chart for quick and accurate dial-in. Essential repair and maintenance reference for technicians servicing this movement, whether performing a complete overhaul or troubleshooting calendar function issues.
Seiko 2220A (24j and 17j) Watch Caliber Parts List and Technical Data
Seiko 2220A mechanical watch caliber parts list and technical data covering both 24-jewel and 17-jewel variants. This documentation provides detailed component diagrams with factory part numbers for the complete movement, including the barrel, train-wheel bridges, wheels and pinions, escapement assembly, regulator, setting lever mechanisms, and balance staff. Technical specifications detail a 17.20mm case diameter, 3.30mm thickness, operating frequency of 28,800 vibrations per hour, manual-wind (non-automatic) configuration, micro-adjuster capability, Diashock shock protection, and Diafix oil lubrication system. The manual includes mechanical assembly drawings with step-by-step references and practical notes on setting lever installation and operation, plus cross-references to broader caliber 2220A workshop documentation. Essential reference for technicians performing caliber maintenance, component replacement, or movement servicing on Seiko mechanical watches using this movement.
Seiko 2406A Calibre 23J Parts List & Technical Data
Seiko 2406A calibre 23-jewel movement parts list and technical reference — the essential document for watchmakers, repair technicians, and movement specialists. This comprehensive guide provides detailed component diagrams with clear part numbering, a complete parts breakdown organized functionally by mechanism (barrel assembly, wheel train, pinions, jewel settings, screws, springs), movement specifications (19.00mm casing diameter, 4.58mm maximum height), setting mechanism instructions, calendar correction procedures, winding stem options, and technical remarks for individual components. Includes material specifications and functional notes throughout. 2 pages of technical drawings and dimensional data suitable for disassembly, repair, replacement work, and movement analysis.
Seiko 2501A Seikomatic Lady - Parts List & Diagram
Seiko 2501A Seikomatic Lady parts list and diagram – comprehensive exploded view reference for the automatic ladies watch caliber 2501A. Includes detailed component numbering, full specifications (17 jewels, 19,800 vibrations per hour, Diashock shock resistance system), and complete parts catalog with manufacturer part numbers for the barrel bridge, gear train, pinions, balance assembly, escapement, regulators, and all movement components. Essential reference for technicians servicing or rebuilding this vintage Seiko automatic movement.
Seiko 2505A Seikomatic Lady Calendar Technical Data & Parts List
Technical data and comprehensive parts list for the Seiko 2505A automatic wristwatch movement. This service manual covers the complete 17.20mm diameter movement with specifications including 5.50mm maximum height, 19,800 vibrations per hour operation, automatic winding mechanism with sweep second hand, and calendar function protected by Diashock shock-resistant technology. Detailed component identification sections with factory part numbers enable accurate troubleshooting, maintenance, and repair work. The complete materials listing for all movement components serves as essential reference for sourcing replacement parts and understanding assembly requirements. Indispensable for watchmakers, technicians, and collectors maintaining or servicing this popular Seikomatic Lady movement.
Seiko 2505B Seikomatic Lady Calendar Parts List
Comprehensive parts list and exploded views for the Seiko 2505B automatic wristwatch, the Seikomatic Lady Calendar model featuring 21 jewels. This service manual provides detailed component nomenclature with part numbers, assembly diagrams, and complete technical specifications including case diameter of 17.20 mm, maximum height of 5.50 mm, and balance wheel frequency of 19,800 vibrations per hour. Essential reference for watchmakers and repair technicians performing maintenance, servicing, or restoration work on this precision automatic movement.
Seiko 2517B Seikomatic Lady Calendar Technical Data and Parts List
Technical data and comprehensive parts list for the Seiko 2517B automatic wristwatch with calendar function. This service manual details the 21-jewel movement (21j/17j style designation) and provides complete specifications: 17.20mm case diameter, 5.85mm maximum height, 19,600 vibrations per hour, automatic winding mechanism with sweep second hand, instant date setting via pull-and-push action, and Diacock shock-resistant device for enhanced durability. The repair guide includes precise numbered identification of all internal components—barrel bridge, center wheel and pinion, escape wheel, locking wheels, date correction finger, date dial guard, oscillating weight axle, transmission wheel, and related parts—with corresponding part numbers essential for maintenance, repair, and accurate reassembly. Ideal for watchmakers, technicians, and serious collectors performing service work on this classic Seikomatic Lady model.
Seiko 2706A Automatic Watch Parts List
Technical data and parts list for the Seiko 2706A automatic wristwatch movement. This service manual covers the complete mechanical specifications of this robust caliber, including 17.20mm casing diameter, 5.70mm maximum height, 28,800 vibrations per hour with automatic winding, sweep second hand, and a dual-language day and date calendar window with dedicated changeover mechanism. The document provides detailed parts identification across all major components, materials specifications, and technical remarks essential for calendar dial assembly and maintenance. Includes Diashock shock-resistant technology. A comprehensive repair reference and troubleshooting guide for technicians servicing or restoring this reliable automatic movement.
Seiko 2906A Caliber 17j Parts List and Technical Data
Seiko 2906A automatic watch movement parts list and technical data for the 17-jewel caliber. This service documentation provides complete specifications for understanding and working with this movement, including casing diameter of 18.00 mm, maximum height of 8.35 mm, and the automatic sweep second hand mechanism. The illustrated parts list breaks down every numbered component with detailed technical characteristics and important remarks covering variant configurations—date dials, day-date wheels, holding rings, and case screws are documented with their specific applications. An essential reference for watchmakers, technicians, and collectors maintaining or repairing this classic Seiko automatic caliber.
Seiko 2906A Caliber Movement Parts List
Comprehensive parts list and technical reference for the Seiko 2906A automatic movement, a 17-jewel caliber housed in an 18mm diameter case. This service manual documents complete movement specifications, including maximum height of 8.35mm and operating frequency of 19,800 beats per hour. Detailed numbered component diagrams identify every element of the movement assembly: barrel, gear train, escape wheel, balance assembly, calendar mechanism, and case components. The guide covers all functional features including automatic winding with manual auxiliary winding capability, sweep second hand, day and date calendar system, instant date-setting device, bilingual changeover mechanism for weekday selection, and Diashock shock protection. Technical remarks address dial construction, day indicator disk assembly, dial retention ring specifications, and case screw fastening details. An essential reference for watchmakers performing maintenance, repair, or complete overhaul of this classic Seiko caliber.
Seiko 2949A 23j Watch Movement Parts List
Complete parts list and exploded views for the Seiko caliber 2949A 23-jewel automatic watch movement. This technical reference covers casing specifications (18.0 mm diameter, 5.3 mm height), movement characteristics (28,800 vibrations per hour, calendar and date functions, bilingual day-of-week display, shock-resistant construction), and comprehensive component identification with part numbers spanning the 011 to 963 series. Detailed technical diagrams illustrate individual components and assembly relationships, making this an essential workshop manual for watchmakers and technicians servicing or restoring this caliber.
Seiko 2A27A Technical Data - Case Disassembly and Reassembly
Seiko 2A27A quartz movement technical data and case assembly reference. Covers complete specifications for this 18.3 mm diameter movement (2.3 mm height without battery, 2 jewels), with methodical disassembly and reassembly procedures for the case back, case ring, and bezel assembly including crystal installation. Includes detailed hand positioning and installation instructions to ensure correct alignment. Essential service manual documentation for watch technicians working with this compact movement.
Seiko 2N20A Movement Parts Catalogue and Technical Guide
Seiko Cal. 2N20A quartz movement parts catalogue and technical service guide. Provides complete specifications for this precision quartz mechanism, with exploded assembly diagrams showing component relationships and a fully indexed parts list using Seiko reference numbers for accurate ordering and identification. Covers battery installation procedures, train wheel bridge calibration settings, and setting mechanism configuration. Includes structural schematics of the circuit block assembly, detailed disassembly and reassembly instructions with technician remarks, and value checking procedures essential for movement verification and regulation. An indispensable workshop manual for watchmakers and technicians servicing Seiko quartz timepieces equipped with this caliber.
Seiko 2P20A Parts Catalogue and Technical Guide
Comprehensive parts catalogue and technical service manual for the Seiko 2P20A quartz watch movement. This workshop reference delivers everything needed for professional repair and maintenance: detailed specifications, complete disassembly and reassembly procedures, fully indexed parts list with numbered references and exploded view diagrams for accurate component identification, and circuit block structure documentation. Covers the load-compensated stepping motor drive system, electronic circuit reset mechanism, and train wheel adjustment procedures. Includes lubrication guidelines specific to this movement and battery specifications for compatible power sources (SEIKO SR516SW, Maxell SR516SW). An essential troubleshooting and rebuild resource for watch technicians working with this precision quartz caliber.
Seiko 3E22A, 3E23A, 3E29A, 3E32A, 3E39A Parts Catalogue and Technical Guide
Comprehensive parts catalogue and technical service guide for Seiko quartz watch movements across five precision models: the 3E22A, 3E23A, 3E29A, 3E32A, and 3E39A. This workshop manual delivers the detailed component breakdowns watchmakers need, with exploded views showing part relationships and assembly sequences. Includes a specifications table covering movement dimensions and tolerances, step-by-step disassembly and reassembly procedures illustrated with technical diagrams, and a complete inventory of dial and date wheel configurations with corresponding part codes. The maintenance section covers critical lubrication points and intervals, battery installation protocols, and detailed technical information on the electronic circuit block architecture that controls timekeeping accuracy. An essential reference for both routine service and comprehensive movement overhaul work.
Seiko 3L12A 3L14A 3L19A Parts Catalogue and Technical Guide
Parts catalogue and technical guide for Seiko quartz watch movements 3L12A, 3L14A, and 3L19A. This workshop manual provides detailed specifications, exploded diagrams of all movement components, complete parts numbering and nomenclature, step-by-step assembly and disassembly procedures, and lubrication specifications for proper maintenance. Technical sections cover the circuit block, battery specifications, train wheel bridge assembly, and setting mechanisms. Includes component identification references, maintenance procedures for service work, and electrical value checking methods to verify movement performance. An essential repair manual and parts reference for watchmakers and technicians working with these Seiko movements.
Seiko 4006A Bell Matic Parts List - 27J Movement
Technical parts list and component identification guide for the Seiko caliber 4006A (27J) Bell Matic automatic watch movement. This repair manual provides a detailed parts catalog with Seiko part numbers, exploded mechanical diagrams showing how each component relates to the overall assembly, and technical illustrations covering all major systems—dial assembly, date mechanism, alarm components, transmission gearing, and calendar parts. Essential reference for watchmakers performing service, repair, or restoration work on this classic alarm chronometer movement. PDF download includes full component breakdown for accurate parts sourcing and assembly verification.
Seiko 4F32A, 8F32A, 8F33A, 8F35A Parts Catalogue & Technical Guide
Complete parts catalogue and technical guide for Seiko quartz watch movements 4F32A, 8F32A, 8F33A, and 8F35A. This document provides detailed specifications covering movement dimensions (Ø18.5-26.4mm), battery information (3.0V, 4-10 year life depending on calibre), and technical data including timekeeping accuracy (within 20 seconds annually), electronic circuit operation, and calendar mechanisms. Features comprehensive parts lists with factory part numbers for ordering replacements, detailed movement diagrams showing component layout and assembly relationships, and illustrated disassembly/reassembly procedures. Includes battery replacement instructions and hand installation guidance. An essential reference for identifying parts and understanding the technical specifications of these Seiko quartz calibres.
Seiko 4K22A Movement Parts Catalogue and Technical Guide
Service manual and parts catalogue for the Seiko 4K22A quartz movement, covering the complete moon phase complication. Includes detailed exploded diagrams of all movement components with numbered parts reference (items 1–40), step-by-step disassembly and reassembly instructions, and lubrication schedules for proper maintenance. Documents the 3-hand display configuration with stepper motor drive, moon phase disc and instant moon phase adjustment mechanism, train wheel positioning device, and electronic circuit reset function. Covers circuit block architecture, battery specifications (SR621SW type, 1.55V nominal, approximately 2-year operational life), and test parameters for coil resistance and current draw. Includes technical notes on electronic calibration and value checking procedures essential for workshop repair and adjustment.
Seiko 4M21A Movement Parts Catalogue and Technical Guide
Seiko 4M21A movement parts catalogue and technical service guide for watch technicians and repair professionals. This comprehensive reference provides complete specifications for the 4M21A automatic quartz movement—a compact 26.4 mm diameter, 2.7 mm height unit with 3-hand configuration. Covers the step motor driving system with load-compensated pulse control, automatic power-generating mechanism, reserve indicator function, and both overcharge prevention and energy-depletion warning circuits. Includes detailed exploded view diagrams with all 46 numbered component parts clearly identified for accurate disassembly and reassembly work. Contains practical lubrication specifications for Moebius A and SEIKO Watch Oil S-6, plus step-by-step procedure references for safe teardown and rebuild. Details movement performance: 9 jewels, polyacene lithium capacitor power supply, approximately 72-hour charge duration, and 0.5–2.3 V operating voltage envelope. Essential workshop manual for anyone servicing Seiko automatic quartz watches with this movement.
Seiko 4N00B, 4N01B, 4N20B Parts Catalogue and Technical Guide
Parts catalogue and technical guide for Seiko quartz watch movements 4N00B, 4N01B, and 4N20B. This workshop manual contains detailed specifications, exploded views of all movement components, comprehensive parts listings with part numbers for ordering and replacement, step-by-step disassembly and reassembly procedures, lubrication guidelines for optimal performance, and essential technical information on circuit block structure, hand installation methods, battery connection protocols, train wheel bridge adjustment, and value checking procedures. An indispensable service reference for watch technicians and repair professionals working with these standard-production Seiko quartz calibres.
Seiko 5206A Calendar Movement Parts List and Technical Data
Complete parts list and technical data for the Seiko 5206A automatic watch movement, a 23-jewel caliber widely used in professional dress watches and field instruments. Includes detailed specifications for the 25.60mm case diameter, 8.95mm thickness, and 28,800 vibrations per hour beat rate. The manual provides comprehensive component diagrams with full parts numbering, essential reference material for watchmakers performing repairs, overhauls, or replacements. Detailed sections cover the calendar mechanism—date finger, setting levers, and holding rings—critical knowledge for servicing the date-change function. Technical notes document micro-adjustment procedures for regulation and verification, along with notes on water-resistance case variations and assembly tolerances. A practical resource for professional horologists and serious enthusiasts working on authentic Seiko movements.
Seiko 5606A Calendar Mechanism Technical Data
Technical data manual for the Seiko 5606A automatic winding watch movement, covering the integrated calendar and date mechanism. Details the movement's specifications including 25.60 mm casing diameter, 4.25 mm height, and 21,600 vibrations per hour. Provides comprehensive service information on calendar mechanism operation, automatic winding system function, and train wheel component layout. Includes dial setting procedures essential for accurate timekeeping and date display. Maintenance and lubrication guidelines specify recommended oils (Moebius Syn-A-Lube and Seiko watch oil S-4) with precise oil quantity charts for each lubrication point. Features exploded diagrams and mechanical drawings that illustrate the calendar system, automatic winding assembly, and train wheel configuration. An indispensable workshop manual for technicians servicing this movement.
Seiko 5606A Calendar Watch Technical Data
Complete technical data and parts catalog for the Seiko 5606A automatic calendar watch movement, covering both 23-jewel and 25-jewel configurations. This service manual details all specifications for the 25.60mm case diameter movement standing 4.25mm tall, with a beat rate of 21,600 vibrations per hour. The fully automatic winding system can be supplemented by manual hand-winding when needed. The integrated calendar mechanism offers day, date, and day-date display options, while shock-resistant construction and a micro-rotor design ensure reliable operation. The illustrated parts list provides numbered component diagrams for complete movement assemblies, gear wheels, bridges, and fastener specifications. Technical notes address setting lever selection, date dial mounting procedures, day star variant options, and holding ring specifications to support accurate assembly and maintenance work.
Seiko 5606A Caliber Technical Data and Parts List
Seiko 5606A caliber technical reference covering both 23-jewel and 25-jewel automatic movement specifications. This document provides detailed component diagrams with factory part numbers, mechanical dimensions (25.60–27 mm case diameter, 4.25 mm maximum height, 21,600 vibrations per hour beat rate), and a comprehensive parts list essential for service and repair work. Covers the automatic winding mechanism, bilingual day-date calendar system, seconds-correction device, and shock-resistant assembly. Includes technical notes on setting lever options and date dial specifications, making it an indispensable workshop manual for technicians maintaining or rebuilding this robust mid-range caliber.
Seiko 5619A Dual-Zone Timer Technical Data and Parts List
Technical data and parts list for the Seiko 5619A 23-jewel dual-zone timer watch—a 23-jewel caliber based on the Calibre 5860A automatic movement. This service manual provides complete specifications including case diameter of 25.60–27mm and maximum height of 4.25mm, along with details on the sweep second hand and sub-hour hand complications. The parts list covers every component with manufacturer part numbers, full nomenclature for movement and case assembly, and practical remarks on setting lever configurations keyed to dial diameter. Also includes date dial specifications for the 3 o'clock crown and date frame position, along with holding ring dimensions for dial installation (27.0mm outer diameter, 0.53mm thickness). Essential reference material for watchmakers, repair technicians, and those performing maintenance on this precision automatic timepiece.
Seiko 5626A Caliber Parts List and Technical Data
Complete technical parts list and service documentation for the Seiko caliber 5626A automatic movement (25 jewels). This workshop manual supplies everything needed to understand, service, and repair this widely-used caliber: detailed parts nomenclature with factory part numbers, precision component photographs, and comprehensive exploded views showing assembly sequences. Specifications include movement dimensions of 25.60mm diameter and 4.50mm height, operating frequency of 28,800 vibrations per hour, and full technical data. Special sections address practical concerns including setting lever selection based on dial diameter, date dial construction and specifications, day-star disc integration with the dial, and exact measurements for the dial-holding ring. An essential reference for watchmakers and technicians working on Seiko 5626A movements.
Seiko 5E29A Parts Catalogue and Technical Guide
Complete parts catalogue and technical workshop manual for the Seiko caliber 5E29A quartz watch movement. This service manual provides step-by-step disassembly and reassembly procedures essential for watchmakers and repair technicians. Includes full parts list with factory reference numbers, exploded component diagrams, movement specifications, and train wheel bridge positioning diagram. The 5E29A is a stepper motor-driven quartz caliber featuring an electronic circuit reset switch and train wheel adjustment mechanism. Details lubrication points and specifications needed for proper maintenance and restoration work on this movement.
Seiko 5H22A, 5H23A Parts Catalogue and Technical Guide
Parts catalogue and technical guide for Seiko quartz watch movements Cal. 5H22A and 5H23A. This comprehensive service manual covers movement specifications, exploded diagrams with precisely numbered components for rapid identification during repair, detailed lubrication requirements for optimal timekeeping, combination tables for wheel assemblies and gear train configuration, circuit block architecture, battery installation instructions, and complete electrical specifications. An essential workshop reference for watch technicians servicing these reliable Seiko movements.
Seiko 5M62A, 5M63A Parts Catalogue/Technical Guide
Complete parts catalogue and technical guide for Seiko caliber 5M62A and 5M63A quartz movements, featuring the step motor drive system used in Kinetic watches. Provides detailed movement specifications including 27.6 mm outside diameter, 4.3 mm height, and 6 jewels. The manual covers the full parts list with numbered components and exploded diagrams for precise identification during repair or service. Includes step-by-step disassembly and reassembly procedures, lubrication requirements with specific oil types for optimal performance, and comprehensive technical specifications on the automatic generating system and KINETIC E.S.U. rechargeable battery technology. Essential reference for understanding power reserve functionality and maintaining these quartz calibers. This service manual provides the technical depth required for professional workshop maintenance and parts replacement.
Seiko 5T32B 5T52B Parts Catalogue and Technical Guide
Complete parts catalogue and technical service guide for Seiko calibre 5T32B and 5T52B quartz movements. Features comprehensive exploded diagrams with part identification, full parts lists including original Seiko part numbers, and complete specifications covering movement dimensions, timekeeping functions, and battery requirements. Covers step-by-step disassembly and reassembly procedures along with detailed lubrication charts and maintenance specifications. The 5T52B variant includes world time functionality with 24-hour time display and selection across 24 time zones. An essential repair manual and workshop reference for watchmakers and technicians working with these Seiko quartz calibres.
Seiko 5Y22A-5Y39A Parts Catalogue and Technical Guide
Comprehensive parts catalogue and technical service manual for Seiko quartz watch movements Cal. 5Y22A, 5Y23A, 5Y30A, 5Y31A, 5Y32A, and 5Y39A. Provides detailed movement specifications including physical dimensions (outside diameter Ø24.0–Ø25.4 mm, casing diameter Ø23.3 mm, height 2.1–2.7 mm), time display configuration in 2 or 3 hands, step motor drive system architecture, integrated date and day calendar functions, and instant calendar adjustment mechanism. Battery specifications cover multiple compatible sources (SEIKO SR920SW, Maxell SR920SW, EVEREADY 371, SONY SR920GW, Matsushita SR920SW) rated at 1.55V with approximately 3 years service life. Includes step-by-step disassembly and reassembly procedures for Cal. 5Y31A movement, supported by an exploded parts diagram with complete identification and reference numbers for every component. Lubrication section details correct application of Moebius A and SEIKO Watch Oil S-6 to ensure proper movement operation and longevity. This workshop manual is essential reference material for watch technicians performing maintenance, repair, or regulated assembly work on these movements.
Seiko 6105A Technical Data and Parts List
Technical data and parts list for the Seiko caliber 6105A automatic wristwatch movement, a 17-jewel workhorse design found in countless sports and dive watches of the era. Comprehensive exploded-view diagrams cover the barrel and train wheel bridge, center wheel, balance cock, third wheel, minute wheel, hour wheel, clutch wheel, and setting lever, as well as all jeweled pivot assemblies, dial, hands, case components, and fasteners. This manual is essential for anyone servicing or rebuilding the 6105A. Technical specifications document a 27.00 mm case diameter, 5.15 mm maximum height, 21,600 vibrations per hour beat rate, automatic winding mechanism with sweep second hand, instantaneous date change, and shock-resistant balance assembly. Includes detailed parts breakdown to support repair, maintenance, and restoration work on these reliable vintage movements.
Seiko 6106A Five Deluxe - Disassembly and Assembly Guide
Complete disassembly and assembly manual for the Seiko 6106A Five Deluxe watch movement. This service guide provides step-by-step procedures for removing and reinstalling the dial, date wheel, date corrector, balance cock, pallet, train wheels, center wheel, pinion, shifting mechanism, and Diashock components. Each procedure includes exploded diagrams and detailed assembly illustrations showing the correct orientation and sequence for reconstruction. An essential reference for watchmakers and technicians servicing this reliable automatic movement.
Seiko 6106A Five Deluxe Technical Data and Parts List
Technical data sheet and parts list for the Seiko caliber 6106A automatic watch movement. This service manual covers the complete mechanical specification of this workhorse movement, including casing diameter of 27.00 mm, maximum height of 5.15 mm, and operating frequency of 21,600 vibrations per hour. The documentation provides a comprehensive parts list with numbered component references, exploded diagrams that illustrate the full mechanical assembly sequence, and detailed technical illustrations covering the date mechanism, automatic winding framework, transmission wheel arrangement, and oscillating weight geometry. Includes specifications for the Diashock shock-resistant device and assembly cross-references essential for accurate rebuild and adjustment work.
Seiko 6106C Technical Data and Parts List
Seiko 6106C Technical Data and Parts List — Complete workshop reference for the 23-jewel and 25-jewel automatic caliber. Covers all essential specifications: 27.00 mm case diameter, 5.15 mm maximum height, 21,600 vibrations per hour beat rate. Contains detailed exploded views and mechanical breakdowns of the barrel, train wheel bridges, balance cock, escape wheel and pinion assembly, dial and calendar work, and the automatic winding mechanism. Every component is cross-referenced with full parts numbering tied to the base 6106A caliber, making this service manual indispensable for accurate repair, maintenance, and restoration work on this robust mid-century Seiko movement.
Seiko 6109A Caliber 17 Jewels Technical Data and Parts List
Complete technical data and parts list for the Seiko 6109A automatic wristwatch movement, a 17-jewel caliber running at 21,600 vibrations per hour. This service manual provides essential specifications: 27.00 mm casing diameter and 5.30 mm maximum height, with automatic winding and sweep seconds hand. The movement features Seiko's Diashock shock-resistant device. The detailed exploded diagram maps every component to its part number, supported by a comprehensive parts identification table with full cross-references—essential for servicing, rebuilding, or sourcing components. A practical reference for watchmakers and technical professionals working on 1970s Seiko automatic movements.
Seiko 6117A Caliber Technical Data
Technical data documentation for the Seiko 6117A caliber (17 jewels), a World Time Navigator Timer movement. This workshop manual provides the detailed specifications and component reference essential for anyone servicing or maintaining this movement. Page 1 contains a comprehensive exploded view with part numbers for all mechanical components — barrel, train wheels, balance assembly, escapement, and calendar mechanism — making it straightforward to identify every part during disassembly and reassembly. Page 2 delivers complete technical information covering over 100 individual components and their specific functions, along with performance specifications tailored to the World Time and Navigator Timer variants. An essential parts list and reference for technicians working with this durable, precise caliber.
Seiko 6117B Navigator Timer - Parts List & Exploded View
Seiko 6117B Navigator Timer movement parts list and exploded view diagram for the 17-jewel caliber 6117B. This technical parts catalog provides a complete component breakdown with numbered parts and specification data including 27.00 mm casing diameter, 5.10 mm maximum movement height, and 21,600 vibrations per hour beat rate. Details the automatic winding mechanism, sweep second hand configuration, instant date-setting capability, and Diashock shock-resistant device. Includes material specifications for each component. Essential reference for watchmakers, technicians, and collectors performing service or restoration work on this Navigator Timer caliber.
Seiko 6118A Caliber Technical Data and Parts List
Technical data sheet for the Seiko caliber 6118A automatic watch movement. This reference includes a complete parts list with Seiko part numbers, exploded component diagrams, and full technical specifications. The movement features a 27.00mm case diameter, 5.15mm maximum height, and operates at 21,600 vibrations per hour with automatic winding, sweep second hand, calendar function, and push-instant date setting protected by the Diashock shock-resistant device. An essential service manual and repair reference for technicians working with this popular mid-century Japanese automatic caliber.
Seiko 6119C Parts List and Exploded View Diagram
Technical parts reference for the Seiko 6119C automatic watch movement, a 21-jewel caliber designed for mid-size dress watches. This service manual provides a complete exploded view diagram showing the precise layout and relationship of all movement components, paired with a comprehensive parts list that includes full part numbers for every spring, jewel, wheel, and bridge. Movement specifications: 27.00mm case diameter, maximum height 5.15mm, 21,600 vibrations per hour (3 Hz), automatic winding system with hack seconds mechanism, and a dual-window calendar displaying both day and date. The documentation also covers important variants in winding stem design, date dial configurations, holding ring specifications, and details on the Diafix oil lubrication device used throughout the movement. Essential for watchmakers, service technicians, and experienced enthusiasts undertaking caliber maintenance, repair, or restoration of this classic mid-century Seiko movement.
Seiko 6138A Automatic Chronograph Parts List and Technical Data
Technical parts list and specifications for the Seiko 6138A automatic chronograph, a high-beat movement with a 27.00mm case diameter and 8.00mm maximum height operating at 21,600 vibrations per hour. This workshop manual details the automatic winding mechanism with manual hand-winding capability, sweep seconds hand, and a dual-display calendar system featuring day and date windows with a bilingual day-of-week selector. The repair guide provides comprehensive parts identification and technical designations throughout the movement, covering the automatic rotor assembly, calendar train, chronograph mechanism, gear train, escapement, and all associated components with their corresponding reference numbers for accurate servicing and maintenance.
Seiko 6138B Automatic Chronograph Parts List and Technical Data
Seiko 6138B Automatic Chronograph Parts List and Technical Data — detailed service documentation for the caliber 6138B movement. This technical reference includes fully annotated exploded diagrams showing every component assembly, a complete parts list with manufacturer part numbers for accurate identification and ordering, and precise technical specifications: 27.00mm case diameter, 8.00mm maximum height, 21,600 vibrations per hour beat rate. Covers calendar and date correction procedures, Diashock shock-resistant mechanism details, and systematic parts identification throughout. Essential reference material for watchmakers, repair technicians, and movement specialists servicing or restoring this classic automatic chronograph caliber.
Seiko 6139A Automatic Chronograph Technical Data
Technical data sheet and comprehensive parts list for the Seiko 6139A automatic chronograph. This service documentation details specifications for a 27.00 mm case diameter, 14.00 mm height movement with 21 jewels, automatic winding, and sweep second hand. Covers the chronograph calendar function (day and date display), bilingual changeover system, and Diaflex oil lubrication device. Includes complete parts identification numbers and materials specifications for all movement components—essential reference material for repair technicians and movement specialists working on this classic automatic chronograph caliber.
Seiko 6139B Automatic Chronograph Technical Data and Parts List
Seiko 6139B automatic chronograph technical manual and parts reference covering the complete caliber 6139B movement. This 17-jewel mechanism delivers a 30-minute chronograph recorder integrated with calendar functionality and shock-resistant construction rated for 27.00 mm case diameter and 7.10 mm maximum height, operating at 21,600 vibrations per hour. The service manual supplies detailed component diagrams and exploded views for each assembly, full part numbering for ordering replacements, and comprehensive material specifications alongside comparative data for the related 6139A caliber. Essential for watchmakers, repair technicians, and horologers performing maintenance, overhaul, or restoration work on vintage Seiko chronographs of this series.
Seiko 6159B Professional Diver's Watch Technical Data & Parts List
Technical data and parts list for the Seiko caliber 6159B Professional Diver's Watch. This repair manual covers component identification through detailed diagrams, part numbering reference, assembly breakdown, and complete specifications for this automatic diving chronometer. Includes documentation of the calendar function, date-setting mechanism, and precision micro-adjustment capability—essential references for service technicians and experienced watchmakers working on this professional-grade timepiece.
Seiko 6308A Caliber - Parts List and Technical Data
Comprehensive parts list and technical specifications for the Seiko caliber 6308A automatic movement. Features detailed component illustrations with assigned part numbers for assembly and service reference. Core specifications include a 27.0 mm case diameter, 5.2 mm movement height, and 21,600 vibrations per hour beat rate. The movement incorporates automatic winding with a sweep second hand, calendar function, and instant date setting capability. Shock resistance is provided by the Diashock device. The remarks section covers critical specifications for the stem unlocking lever, available date dial configurations, holding ring selection guidelines, and oscillating weight compatibility with caliber 61 series movements—essential information for technicians performing maintenance or restoration work on these watches. This parts list and technical data serves as a reference for service and workshop manual applications.
Seiko 6309A 17J Automatic Watch Parts List
Technical parts list and identification guide for the Seiko 6309A automatic watch movement, caliber 6309 with 17 jewels. This comprehensive repair and maintenance reference provides the detailed specifications essential for service technicians: case diameter 27.0 mm, maximum height 5.2 mm, operating frequency 21,600 vibrations per hour, automatic winding mechanism, sweep second hand, and dual calendar display (day and date). The movement incorporates an instant calendar-setting device and Diashock shock protection system for reliable everyday wear. Documentation includes complete parts diagrams with part numbers and component nomenclature for every internal element of the movement, along with technical notes on stem lever options, date wheel configurations, rotor compatibility specifications, and holding ring details. An essential workshop reference for anyone servicing or maintaining this classic and widely respected automatic caliber.
Seiko 6319A 21J Parts Catalog and Technical Data
Technical parts catalog and reference guide for the Seiko caliber 6319A 21-jewel automatic watch movement. This service document provides detailed component breakdown with original part numbers, nomenclature, and full specifications: 27.0 mm diameter, 5.2 mm height, and 21,600 vibrations per hour. Comprehensive exploded diagrams show the precise arrangement and relationship of all internal parts, making this essential for watch repair, maintenance, and restoration. Includes technical data for accurate identification and sourcing of replacement components. Ideal for professional watchmakers and experienced enthusiasts performing mechanical watch service and overhaul on this classic Seiko caliber.
Seiko 66B Sportsman 17 - Parts List and Exploded Views
Seiko 66B Sportsman 17 manual-wind movement parts list and exploded views. This comprehensive parts catalog covers the 17-jewel Seiko 66B caliber with sweep second hand, providing detailed exploded diagrams of all movement components along with numbered part references and complete part specifications. Includes bridges, wheels, pinions, jewel settings, screws, and all mechanical elements needed for service and repair. Documents the Diashock shock-resistant device and Diafix oil lubrication system that distinguish this movement. Essential reference for watch technicians performing maintenance, restoration, or component replacement on Seiko 66B watches.
Seiko 6M13A Parts Catalogue and Technical Guide
Seiko 6M13A quartz movement parts catalogue and technical service manual. Provides complete specifications alongside exploded diagrams of all movement components for reference during repair and maintenance work. Details disassembly and reassembly procedures with step-by-step guidance on correct lubrication points and techniques. Covers battery installation, circuit block architecture and electrical layout, and precise reassembly protocols for critical elements including hands, mode indicator, dial, winding stem, and clutch wheel. An essential workshop manual for technicians servicing this movement.
Seiko 6M23A Parts Catalogue and Technical Specifications
Parts catalogue and technical specifications for the Seiko 6M23A quartz movement. This comprehensive service manual covers a 9-jewel stepping motor mechanism measuring 3.7 mm in height with a 26.4 mm casing diameter. The movement drives a three-hand configuration including a 24-hour hand and mode indicator via a four-piece stepper motor system. Detailed technical data includes the alarm function using a 24-hour system, stopwatch capability with measurement increments of 1/10 second during the first 60 minutes and extended timing up to 32 days, automatic calendar advancing through year, month, and date entries programmed to 2099, and dual time display function. The manual documents hands reset adjustment procedures, alarm test circuitry, electronic circuit reset controls, and battery life indicator operation. Monthly timekeeping accuracy remains within 15 seconds. Power specifications identify four compatible battery types: SEIKO SR927W, Maxell SR927W, SONY SR927W, and EVEREADY 399, each delivering approximately 2 years of service life at 1.55 volts. The manual includes step-by-step movement disassembly and reassembly procedures essential for service work, lubrication specifications calling for Silicone Oil at 500,000 centistokes, Moebius A, or SEIKO Watch Oil S-6, and detailed documentation of case structure variants designated Type 1 and Type 2. This parts list and workshop reference serves technicians performing complete movement service, component replacement, and precision adjustments on this popular multifunction quartz caliber.
Seiko 7002A Parts List and Technical Data
Parts list and technical data for the Seiko caliber 7002A automatic watch movement. Includes front and rear movement views with specifications: 27.4mm outside diameter, 27.0mm casing diameter, 4.9mm height, three-hand time indication, 21,600 vibrations per hour, automatic winding, date calendar with instant setting device, and 17 jewels. The service manual features a detailed exploded diagram of all internal components with numbered references to aid identification during repair or maintenance work. Covers complete disassembly and reassembly procedures, comprehensive parts listings for screws and jewels, lubrication specifications for optimal performance, and technical notes on adjustment and wear limits. An essential workshop reference for anyone servicing or restoring this widely used movement.
Seiko 7005A Calendar Setting Mechanism Service Manual
Comprehensive service manual for the Seiko 7005A automatic winding watch movement, covering the calendar setting mechanism in full technical detail. This workshop manual documents the 27.00 mm diameter movement with 4.50 mm height specification, operating at 21,600 vibrations per hour. The repair documentation includes step-by-step disassembly and reassembly procedures with clearly numbered components, detailed instructions for the automatic winding system and train wheel assembly, transmission of force diagrams essential for understanding power delivery through the movement, and precise hands and date setting mechanism procedures with illustrated positioning guides. A complete lubrication reference section specifies correct oil types for each component, ensuring proper maintenance and longevity of the movement. This troubleshooting and maintenance guide is invaluable for watchmakers performing service, restoration, or routine maintenance on this classic automatic movement.
Seiko 7016A Automatic Chronograph Parts List
Complete parts identification and materials reference for the Seiko 7016A automatic chronograph. Covers the 17-jewel Cal. 7016A movement—derived from the proven Cal. 7005A platform—with detailed technical diagrams showing every component, part number, and material specification. Essential for anyone servicing or restoring this model, whether you're sourcing replacement parts, verifying assembly sequences, or performing maintenance on the chronograph mechanism. Includes the full parts catalogue needed for accurate repair and rebuilding work.
Seiko 7018A Caliber Technical Data - Parts List and Component Identification
Technical parts list and component reference for the Seiko 7018A caliber, a 23-jewel automatic chronograph movement. This workshop manual provides comprehensive parts identification with full part numbers and material specifications, including detailed component tables and exploded assembly diagrams covering the barrel, gear train (wheels and pinions), escape wheel, and chronograph wheel section. Technical specifications detail the movement's dimensions (27.00 mm diameter, 5.90 mm height) and beat rate (21,600 vibrations per hour), along with variations for winding stem options, date dial configurations, and holding ring assemblies. Essential reference for technicians performing overhaul, repair, or restoration work on Seiko 7018A movements.
Seiko 7019A Calendar Watch Parts List and Technical Data
Technical parts list and service reference for the Seiko 7019A automatic calendar watch movement. Documents the complete specification set for this 27mm case, 4.85mm height caliber — 21 jewels, 21,600 vibrations per hour — with exhaustive parts breakdown including part numbers and functional descriptions. Features exploded diagrams detailing every internal component and assembly, movement characteristics, and essential technical notes covering the winding stem geometry, date dial mechanism, and dial-holding ring configurations. An indispensable repair manual resource for technicians servicing this popular mid-century automatic.
Seiko 7625A Sportsmatic Calendar Movement - Parts List
Technical parts list and service documentation for the Seiko caliber 7625A automatic wristwatch movement. This 17-jewel mechanism features a calendar complication with sweep second hand, housed in a 27.60 mm diameter case standing 5.70 mm tall and running at 18,000 vibrations per hour. The manual delivers complete exploded diagrams of every mechanical assembly, detailing each component's function within the movement. A comprehensive parts list cross-references each piece with its factory part number and material composition, essential for anyone performing repair, maintenance, or restoration work on this Sportsmatic caliber. The movement incorporates Seiko's Diashock shock-resistant device to protect the delicate balance assembly during wear. Whether you're a watchmaker conducting routine service or restoring a vintage Seiko automatic, this reference covers the mechanical architecture you need to understand how the 7625A operates and how its components interact.
Seiko 7D48 Technical Instruction - Calendar Circuit Assembly
Seiko 7D48 Technical Instruction for Calendar Circuit Assembly — comprehensive workshop manual covering the precise assembly sequence of the calendar mechanism. Details the step-by-step installation of the control jumper, ratchet lever, contact point spring, and connector components, with explicit positioning tolerances and engagement verification procedures. Includes color-coded mechanical diagrams for component orientation and assembly flow, lubrication schedules for pivots and guide slits to ensure smooth calendar operation, and quality assurance inspection checkpoints to confirm proper fit and alignment before closure. Essential service reference for technicians performing calendar circuit work on this movement.
Seiko 7F22A, 7F24A, 7F26A, 7F27A Parts Catalog and Technical Guide
Seiko 7F22A, 7F24A, 7F26A, and 7F27A parts catalog and technical service guide covering these four-digit quartz watch calibers. Detailed specifications include movement dimensions, time display systems, escapement and drive mechanisms, battery requirements, and complete exploded-view diagrams with part numbers for each component. The guide walks through disassembly and reassembly of calendar and date wheel mechanisms, making it essential for anyone servicing or repairing these popular Seiko movements. Includes all technical data needed for accurate parts identification and mechanical adjustment during workshop maintenance.
Seiko 7F38A, 7F39A, 7F68A, 7F69A Parts Catalogue & Technical Guide
Parts catalogue and technical guide for Seiko quartz watch movements 7F38A, 7F39A, 7F68A, and 7F69A. Includes complete movement specifications table with dimensions (Ø24.0 mm casing diameter, 2.9 mm height), movement features (step motor with load-compensated driving pulse, 24-hour hand, dual time function, moon phase hand, day hand, date hand, instant lunar calendar setting device, instant calendar setting device, train wheel setting device, electronic circuit reset switch, and battery life indicator), technical parameters (monthly rate less than 15 seconds at normal temperature, 3 jewels, SEIKO SR916SW or Maxell SR916SW battery with approximately 3 years life at 1.55V), and illustrated parts breakdown showing case assembly components, dial, hands, moon phase indicator, and winding stem details.
Seiko 7M22A Movement Parts Catalogue and Technical Guide
Complete parts catalogue and technical guide for the Seiko 7M22A kinetic-powered movement. This workshop manual delivers detailed specifications, exploded diagrams with full part numbering for hands, dial, date mechanism, train wheels, and electronic components. Includes step-by-step disassembly and reassembly procedures, lubrication schedules, structural schematics of the circuit block, and adjustment protocols. Covers capacitor voltage ratings, current consumption data, and systematic checking procedures for the power-generation system—essential reference for any technician servicing this movement.
Seiko 7N22A, 7N29A, 7N33A, 7N42A, 7N43A Parts Catalogue and Technical Guide
Seiko 7N22A, 7N29A, 7N33A, 7N42A, and 7N43A quartz watch movement parts catalogue and technical service guide. Provides complete specifications table, detailed exploded-view parts breakdown with numbered diagrams for each movement, step-by-step assembly and disassembly procedures, hand installation height technical remarks, battery installation guidance, date dial guard removal and installation sequences, train wheel bridge positioning adjustments, winding stem installation methods, and value checking specifications covering coil block resistance and current consumption. Essential reference for watch technicians and repair professionals working with these Seiko quartz calibres.
Seiko 7N82A, 7N83A, 7N89A - Parts Catalogue and Technical Guide
Complete parts catalogue and technical guide for Seiko 7N82A, 7N83A, and 7N89A quartz watch movements. This service manual provides detailed component illustrations with numbered references, movement specifications, and circuit block schematics essential for professional watch repair and maintenance. Covers systematic disassembly and reassembly procedures, step-by-step installation instructions for hands, battery replacement, date dial guard positioning, train wheel bridge alignment, and winding stem removal and fitting. Includes critical value-checking parameters for coil block resistance testing and current consumption verification to ensure proper movement function after repair. An indispensable workshop reference for technicians servicing these popular Seiko calibers.
Seiko 7N82C, 7N83C, 7N85C, 7N89C Parts Catalogue and Technical Guide
Comprehensive parts catalogue and technical service manual for Seiko quartz watch movements Cal. 7N82C, 7N83C, 7N85C, and 7N89C. This workshop reference provides detailed specifications and exploded diagrams for each movement, enabling technicians to identify and source exact replacement components by reference number. Includes critical hand installation height discrimination data to ensure proper dial clearance and function. Complete technical guidance covers movement disassembly and reassembly procedures, circuit block architecture, train wheel bridge adjustment, battery installation protocols, and electrical parameter verification methods. An essential resource for watch repair professionals and experienced hobbyists servicing these popular Seiko quartz calibres.
Seiko 7S26A, 7S36A Parts Catalogue & Technical Guide
Seiko 7S26A and 7S36A parts catalogue and technical guide for automatic watch movements. Features detailed specifications including movement size (Ø27.4mm casing, 4.9mm height), 21,600 vibrations per hour, 3-hand time indication, and key features: automatic winding, date calendar, day calendar, instant date and day setting devices. The 7S26A features 21 jewels while the 7S36A has 23 jewels. Includes complete parts list with official Seiko part numbers and detailed exploded diagrams of movement assemblies. Covers lubrication requirements using Moebius A and Seiko Watch Oil grades S-4 and S-6 with specific application symbols for each component type. An essential technical reference for movement identification and parts sourcing.
Seiko 7T24A, 7T34A, 7T36A, 7T44A Parts Catalogue/Technical Guide
Complete parts catalogue and technical reference for Seiko quartz watch movements covering calibers 7T24A, 7T34A, 7T36A, and 7T44A. This workshop manual details movement specifications including dimensions, height, and caliber comparison data essential for accurate identification and repair. Covers all time indication functions—calendar, stopwatch, alarm, and timer—along with driving system architecture, battery specifications, and operating parameters. Includes electronic circuit reset switch procedures, battery life indicator operation, stopwatch performance data, and measurement standards for service technicians. This service manual provides the parts breakdown and technical documentation needed for movement servicing, component replacement, and troubleshooting of these popular quartz calibers.
Seiko 7T32B 7T42B Parts Catalogue and Technical Guide
Complete parts catalogue and technical guide for Seiko caliber 7T32B and 7T42B quartz chronograph movements. This service manual provides detailed exploded views with comprehensive part numbering, full specifications, and step-by-step disassembly and reassembly procedures essential for workshop repair and maintenance. Covers battery installation, circuit block architecture, and technical specifications for replacement and servicing of critical components including winding stems, hands, dials, wheels, and electronic circuit elements. An indispensable reference for watchmakers and technicians working on these calibers.
Seiko 8800C Caliber 7J Service Manual - Parts List and Technical Data
Seiko 8800C Caliber 7J Service Manual - Parts List and Technical Data Complete workshop manual for the Seiko 8800C automatic movement (7 jewels), essential reference for watch technicians performing calibration, repair, and maintenance work. Provides detailed dial and case views alongside key movement specifications—40.25 mm casing diameter, 7.55 mm overall height, 18,000 vibrations per hour, and Diashock shock resistance system. The parts list assigns factory part numbers to every component, eliminating guesswork during assembly or replacement. Technical sections address practical variations technicians encounter: winding stem configurations matched to specific case diameters, precise balance cock washer thickness tolerances, hammer adjustment disk reference markings, winding stem screw profiles for different case sizes, and dial screw sizing differentiated between silver and black finished dials. Whether you're performing routine servicing, troubleshooting timekeeping issues, or restoring a movement to factory specification, this manual supplies the exact technical data and component identification required for professional-standard work.
Seiko 8800D Stopwatch - Parts List and Technical Specifications
Seiko 8800D 7-jewel stopwatch parts list and technical specifications manual. This documentation provides a complete mechanical breakdown of the Seiko 8800D movement, with detailed exploded-view diagrams of every component assembly. Specifications include 40.25mm casing diameter, 7.55mm maximum height, 36,000 vibrations per hour beat rate, and Diashah shock-resistant device. The parts list supplies full reference numbers for barrel, train wheels, balance assembly, escapement mechanism, winding stem, regulator, operating levers, springs, and fasteners. Technical notes cover winding stem variants for different case types, balance cock washer thickness tolerances, hammer adjustment disk markings, and dial screw specifications keyed to dial color. An essential reference for anyone servicing, maintaining, or restoring this classic Seiko stopwatch movement.
Seiko 8M26A 8M32A Watch Movement Parts Catalogue and Technical Guide
Complete parts catalogue and technical service guide for Seiko 8M26A and 8M32A quartz watch movements. This workshop manual provides detailed movement specifications, step-by-step disassembly and reassembly procedures with numbered component diagrams for precise parts identification, lubrication schedules and specifications, and essential technical notes covering circuit block architecture, hands installation and removal, dial extraction, winding stem replacement, battery installation procedures, and systematic troubleshooting. The guide addresses stepper motor driving systems, integrated stopwatch and countdown timer functions, alarm repeat timer operation, and critical wheel positioning guidance for train wheel assembly alignment. Indispensable reference for watchmakers performing service, overhaul, and repair work on these Japanese quartz movements.
Seiko 8S21A 8S23A Solar Watch Parts Catalogue Technical Guide
Seiko 8S21A 8S23A Solar Watch Parts Catalogue and Technical Guide — comprehensive service reference for these compact solar quartz movements. Features detailed exploded views of all movement components with annotated part identification. Provides complete specifications including physical dimensions (outside diameter 24.0–29.5mm, height 2.9–3.0mm) and full solar cell and capacitor power supply architecture. Includes assembled parts listing with factory part numbers for accurate component sourcing and replacement. Step-by-step disassembly and reassembly procedures cover critical areas: dial and hands installation, circuit block integration, train wheel bridge positioning, and date mechanism setup. Dedicated sections on checking and adjusting the quick start function and capacitor unit conductivity ensure proper movement function after service. Essential reference for watch technicians and authorized service centers working on these solar calibers.
Seiko A029A Digital Quartz Watch Parts List
Seiko A029A parts list for the digital quartz movement, with illustrated identification of all major assemblies: LCD module, case structure, circuit board, battery compartment, display panel, and switch mechanisms. Each component is cross-referenced with manufacturer part numbers to streamline sourcing and replacement during service or repair. Essential reference for technicians maintaining or restoring this classic digital quartz caliber.
Seiko A127A Digital Quartz Watch Parts List
Parts list for the Seiko A127A digital quartz watch (caliber A127A). This comprehensive parts manual includes illustrated component references and part numbers for every assembly, from the movement and display module to case components, circuit blocks, battery, and internal hardware. Enables you to identify, source, and order genuine Seiko parts for repair, restoration, or maintenance of the A127A. Essential reference for watch technicians, repairers, and collectors working with this classic digital model.
Seiko A128A Digital Quartz Parts List
Comprehensive parts list for the Seiko A128A digital quartz movement, detailing every component with accurate part numbers and exploded diagrams. Use this service manual to identify replacement parts, order spares, or understand the movement's internal structure. Essential reference for watch technicians and repair professionals working on this model.
Seiko A134A Digital Quartz Watch Parts List
Complete parts list for the Seiko A134A digital quartz watch movement. This service manual provides all component reference numbers organized by functional group—case assembly, movement module, LCD display, battery specifications, and miscellaneous replacement parts. The Maxell SR1130W silver-oxide battery is identified with its corresponding part number. Use this parts list for ordering genuine Seiko components, identifying worn or failed parts during repair, and ensuring correct assembly of the A134A movement. Essential reference for watch technicians and experienced hobbyists performing maintenance or restoration work on this model.
Seiko A135A Digital Quartz Parts List
Seiko A135A digital quartz watch parts list featuring exploded-view diagrams to identify every component. The manual covers the circuit block, liquid crystal display frame, switch spring, connector, LCD panel, reflecting mirrors, panel holder, speaker assembly and fasteners. Battery compatibility is specified for three silver-oxide cell types: Maxell SR1120W, U.C.C. 391, and Toshiba SR1120W. Technical specifications and practical guidance on liquid crystal panel alignment ensure accurate reassembly during repair or maintenance work. Essential reference for technicians servicing this digital quartz model.
Seiko A156A Digital Quartz Watch Parts List
Seiko A156A Digital Quartz Watch Parts List – Complete Movement and Case Assembly Reference. Detailed parts catalog for the Seiko A156A quartz movement, identifying every component and replacement part by reference number. Essential for watchmakers, technicians, and collectors performing maintenance, repair, or restoration work on this classic digital watch model. Includes systematic breakdown of movement components, case assembly parts, and all associated hardware needed for service and assembly operations. Invaluable resource for ordering exact OEM replacement parts and understanding the mechanical structure of the A156A caliber.
Seiko A158A Digital Quartz - Parts List
Comprehensive parts list for the Seiko A158A digital quartz watch movement, serving as an essential reference for technicians and watchmakers performing repair, maintenance, or module replacement work. The document provides detailed component identification with corresponding part numbers throughout the movement assembly, covering the LCD display module, main circuit board, stepper motor, power source specifications, quartz resonators, and all mechanical subassemblies. Use this parts catalog alongside your service manual or workshop manual to source exact replacement components, verify assembly sequences, or troubleshoot movement failures. Ideal for professional horologists, independent watch repair technicians, and enthusiasts undertaking disassembly and reassembly of this iconic digital quartz model.
Seiko A159A Quartz LC Alarm Chronograph Parts List
Complete parts list and reference guide for the Seiko A159A quartz LC alarm chronograph. This workshop manual provides detailed specifications including the 28.0 mm case diameter, 7.0 mm height, and 32.768 Hz quartz frequency that defines the movement's precision timing. The technical breakdown covers all functional components: the dual alarm and chronograph mechanisms, perpetual calendar system, 12-hour digital display, and the micro-adjuster with trimmer condenser calibration system that maintains frequency accuracy. Illustrated parts diagrams with individual reference numbers identify every movement component and case assembly element, making this an essential service manual for technicians performing maintenance, repair, or parts replacement on this classic digital chronograph model. The illuminated LCD panel specifications are also documented for reference during restoration work.
Seiko A159A Quartz LC Alarm Chronograph Parts List
Parts list for the Seiko A159A Quartz LC alarm chronograph watch. This comprehensive parts reference delivers detailed component specifications and part numbers for the liquid crystal digital alarm chronograph, covering the 26.9 mm case diameter and 7.0 mm maximum height construction. The documentation covers the 32.768 Hz quartz crystal oscillator, 12-hour digital display module, chronograph timing functions, calendar display, alarm mechanism, and illumination light assembly. Essential for repair technicians, watchmakers, and service centers needing exact component identification and cross-reference data for restoration and maintenance work on this classic digital sports watch model.
Seiko A169A Digital Quartz Watch Parts List
Comprehensive parts list for the Seiko A169A digital quartz watch, featuring detailed exploded-view illustrations paired with genuine Seiko part numbers for every component. This reference covers circuit board assemblies, LCD display modules, quartz movement parts, battery specifications, case and band hardware, and all mechanical elements needed for routine servicing and component replacement. An essential resource for watchmakers and technicians maintaining this iconic digital model.
Seiko A229A Digital Quartz Movement Parts List
Seiko A229A Digital Quartz Movement Parts List – comprehensive illustrated guide to component identification and part numbering for the Cal. A229A digital quartz watch movement. This parts list covers all essential assemblies including case components, LCD display module, pushbutton switches, circuit board elements, and battery specification (Maxell SR926W silver oxide cell). Detailed diagrams and systematic component labeling make this an indispensable reference for service technicians, watchmakers, and anyone performing maintenance or repair work on this movement. Whether you need to source replacement parts, understand movement architecture, or verify component compatibility, this illustrated parts identification document provides the exact part numbers and visual references required.
Seiko A239A Digital Quartz Parts List
Seiko A239A digital quartz parts list with detailed exploded views showing every internal component from the circuit modules and liquid crystal display panels through to the switch assemblies, connectors, and case structure. Each part is cross-referenced with its corresponding Seiko part number, making this essential for technicians performing repairs, maintenance, or rebuilding work on this model. The illustrated breakdown covers the complete movement assembly, battery contacts, and all case components necessary for accurate identification and ordering of replacement parts.
Seiko A257A Digital Quartz Parts List
Comprehensive parts list for the Seiko A257A digital quartz movement, featuring detailed component identification with factory part numbers and exploded assembly diagrams. This reference guide covers all individual replacement parts required for servicing and repair of the A257A caliber, making it an essential resource for watchmakers and technicians performing routine maintenance or component replacement on this popular digital quartz model.
Seiko A258A Digital Quartz Parts List
Comprehensive parts list for the Seiko A258A digital quartz movement (caliber A258A). This detailed reference manual provides illustrated breakdowns and part reference numbers for every component you'll encounter during assembly, maintenance, or repair work. Covers the circuit board and display module, along with hands, springs, jewels, and all mechanical components essential for understanding the movement's construction and sourcing replacements. An indispensable resource for watchmakers and technicians working on this caliber.
Seiko A259A Digital Quartz Parts List
Comprehensive parts list for the Seiko A259A Digital Quartz watch movement, featuring detailed illustrated breakdown of all components and subassemblies with reference numbers. Essential reference material for watch technicians, repair shops, and hobbyists performing maintenance or component replacement on this quartz movement. Includes identification and location of every part required for assembly, disassembly, and repair work.
Seiko A354A Digital Quartz Parts List
Comprehensive parts list for the Seiko A354A digital quartz watch (Cal. A354A). This repair manual provides detailed component identification with factory part numbers for all major assemblies—movement plates, mainspring, display module, circuit board, and case components. Organized by assembly section for quick reference during service, it's an essential resource for technicians performing maintenance, repair, or parts replacement on this model.
Seiko A358A Digital Quartz Parts List
Seiko A358A Digital Quartz Parts List — comprehensive reference guide with detailed component photographs and part numbers for the Seiko Cal. A358A digital quartz movement. Covers case assembly components, module subassemblies, LCD display elements, and internal mechanisms with precise part identification. Essential resource for watchmakers and technicians performing repair, maintenance, or restoration work on this popular quartz caliber.
Seiko A359A Digital Quartz Parts List
Parts list and repair reference for the Seiko A359A digital quartz watch. Features detailed exploded view diagrams of the case assembly and internal movement components, with each part clearly labeled by reference number for accurate identification and ordering. Essential resource for service technicians and watch enthusiasts performing disassembly, reassembly, or component replacement on this quartz model.
Seiko A439A Digital Quartz Parts List
Comprehensive parts list for the Seiko A439A digital quartz watch movement. This detailed reference document identifies every component used in assembly and repair work, including movement modules, circuit board assemblies, battery specifications, crystal units, fasteners, and all internal mechanical and electronic parts with their corresponding part numbers. Essential for technicians performing service, maintenance, or complete rebuild operations on this model.
Seiko A557A Digital Quartz Parts List
Comprehensive parts catalog for the Seiko A557A digital quartz watch. This manual systematically illustrates individual watch components and replacement parts with corresponding reference numbers, enabling precise identification and ordering. Essential reference for technicians performing maintenance, repairs, or module replacement on this model. Includes detailed breakdowns of internal mechanisms, case assemblies, and electronic modules specific to the A557A platform.
Seiko A639A Digital Quartz Parts Catalogue
Parts catalogue for the Seiko A639A digital quartz watch, providing exploded diagrams and part numbers essential for service and repair work. This manual offers detailed component breakdowns that enable technicians and watch enthusiasts to identify and source exact replacement parts. The comprehensive parts list covers the full assembly, making it invaluable for anyone undertaking maintenance, restoration, or component-level troubleshooting on this model.
Seiko A721A Watch Module Parts Catalogue and Technical Data
Complete service and technical reference for the Seiko A721A digital watch module (Cal. A721A), a Nematic Liquid Crystal display unit with 1/4 multiplex driving architecture. This parts catalogue and technical data document covers the 27.5mm diameter, 5.0mm height module in full detail. Specifications include dual 12/24-hour time and calendar display, stopwatch with split and lap timing capability, memory storage for up to 100 measurements, alarm display function, illuminating backlight, and confirmation sound feedback. The manual provides complete module structure diagrams, comprehensive parts list with exploded assembly views and individual part numbers for accurate identification and ordering, battery compatibility data (SEIKO CR2016, Maxell CR2016, Sanyo CR2016, Matsushita CR2016, EVEREADY CR2016), and verified technical performance standards including monthly accuracy within 20 seconds. Essential reference for technicians servicing or repairing this popular quartz module, or for replacement parts sourcing and module assembly verification.
Seiko A781A Watch Module Parts List and Technical Data
Seiko A781A digital watch module parts list and technical reference manual covering the Cal. A781A movement. Features complete component inventory with detailed specifications: 29.4mm diameter case, 5.3mm thickness, Nematic liquid crystal display with 1/3 multiplex driving system supporting time, calendar, stopwatch, lap timer and alarm functions. Exploded diagrams document all internal assemblies including battery clamp, circuit block cover, insulators, buzzer terminal, battery contacts, integrated circuit block, front switch springs, connectors, and liquid crystal panel. Includes step-by-step disassembly and reassembly guidance plus battery replacement procedures — essential reference for service technicians and repair specialists working on A781A modules.
Seiko A8 Series Digital Quartz Parts Catalogue
Seiko A8 Series Digital Quartz Parts Catalogue for Cal. A826A, A827A, and A828A movements. This parts list provides technical specifications and a comprehensive inventory of components with original Seiko part numbers, essential for anyone servicing or restoring these digital quartz watches. Detailed photography covers the case assembly, movement plate, LCD panel, power cell, and fasteners. The catalogue documents all functional variants including display configurations, alarm mechanism, chronograph/stopwatch capability, time signal circuit, and LED illumination—allowing technicians to identify the correct parts for each specific caliber and function set. Whether you're performing routine maintenance, replacing worn components, or sourcing spares for repair, this reference ensures accurate parts matching and ordering.
Seiko A826A Digital Quartz Technical Guide
Technical service manual for the Seiko A826A digital quartz watch (caliber A826A). This workshop guide details the watch's specifications and circuit block architecture, with comprehensive coverage of display functionality and LCD panel electrode configuration. Includes step-by-step case disassembly and reassembly procedures with proper lubrication protocols, complete module teardown with individual component identification, and systematic checking and adjustment routines for accurate timekeeping. Features detailed illustrations of case components, rotating ring and middle assembly construction, and alarm circuit diagnostic guidance to help troubleshoot common issues.
Seiko A829A Digital Quartz Parts List
Parts list for the Seiko A829A digital quartz watch movement. This comprehensive catalogue illustrates every component with its corresponding part number, covering the case assembly, movement plates, jewel settings, Sanyo CR2016 battery specification, and the complete range of screws and fasteners required for assembly and repair work. An essential reference for technicians servicing or rebuilding this movement.
Seiko A860A A861A Parts Catalogue and Technical Guide
Seiko A860A and A861A quartz watch movement parts catalogue and technical service guide. Complete parts list with numbered exploded diagrams for both movements, detailed disassembly and reassembly procedures, lubrication specifications, and circuit block structure documentation. Covers battery installation requirements, component placement details, and value verification methods for speaker resistance and current draw. Includes operating instructions for all functions—time display, stopwatch mode, and alarm operation—plus comprehensive technical specifications for the nematic liquid crystal display module, voice synthesis system, and battery life performance. An essential workshop manual and repair reference for technicians servicing these talking watch movements.
Seiko A904A Digital Quartz - Parts Catalogue
Parts catalogue for the Seiko A904A digital quartz watch, featuring detailed exploded view diagrams that systematically break down all internal components. Covers the battery, circuit block cover, battery clamp, insulators, buzzer terminal, connector, reflecting mirror, liquid crystal display frame, and piezoelectric element. Each part is identified with its reference number to simplify ordering and assembly work. Essential reference for technicians performing maintenance, repair, or restoration on this model. Includes the complete assembly structure so you can understand how each component fits together and trace the path of every part in the mechanism.
Seiko A914A Digital Quartz - Parts List
Parts catalogue for the Seiko A914A digital quartz watch (caliber A914A). Comprehensive component identification with part numbers and visual references for all watch components, including case parts, movement modules, LCD display panels, battery contacts, and circuit components. Essential reference for identifying and sourcing replacement parts.
Seiko A927A Digital Quartz Parts Catalogue
Seiko A927A digital quartz watch parts catalogue. This technical reference provides a complete breakdown of the A927A movement and case assembly, with full specifications including casing diameter 28.1 mm, maximum height 4.9 mm, and quartz crystal oscillator frequency 32,768 Hz. The illustrated parts list identifies all 13 components essential for service and repair work, from the circuit block and insulator through to the liquid crystal panel frame, circuit covers, reflecting mirror, and lithium battery. Includes critical technical notes on liquid crystal panel matching compatibility and battery substitution guidelines—useful reference material for watchmakers performing maintenance or parts replacement on this model.
Seiko A939A Digital Quartz Parts List
Seiko A939A Digital Quartz Parts List — comprehensive parts catalog for the A939A quartz movement with full part numbers and detailed visual component diagrams. This parts list covers case backs, battery clamps, insulators, bezels, connectors, circuit covers, reflective mirrors, and all internal mechanical and electronic components essential for repair, service, and replacement work on Seiko A939A watches. Includes visual cross-references for accurate part identification during disassembly and reassembly operations.
Seiko A944A Dual Power Module Parts Catalogue and Technical Guide
Seiko A944A dual power module parts catalogue and technical service guide covering the complete nematic liquid crystal display module (24.5 mm to 27.5 mm diameter) with multiplex drive circuitry. This repair manual provides step-by-step disassembly and reassembly procedures essential for technicians servicing this dual power system. Detailed parts diagrams include all component part numbers, circuit block schematics, and electrical specifications. The battery installation section covers the SEIKO CR1616 cell with 7-year operational life and solar cell replacement procedures. Includes practical guidance on switch lead terminal installation, electrical value verification, and the critical relationship between liquid crystal panel segment mapping and C-MOS-LSI output terminal assignments. Technical data incorporates upconverter coil specifications and current consumption measurements for diagnostics and performance troubleshooting. A comprehensive workshop reference for module-level repair and component-level maintenance.
Seiko A965A A966A Parts Catalogue / Technical Guide
Parts catalogue and technical guide for Seiko caliber A965A and A966A digital watch modules. This service manual covers complete technical specifications for the Nematic Liquid Crystal display operating in Field Effect Mode, module dimensions (29.5 mm outside diameter, 5.2 mm height), and detailed component identification. Includes disassembly and reassembly procedures with fully illustrated parts breakdown, circuit block diagrams, battery specifications, and exploded component views—all essential reference material for repair and maintenance of these precision movements.
Seiko B004A Digital Quartz Parts List
Seiko B004A digital quartz parts catalog featuring detailed illustrated breakdowns with reference numbers for every component. Essential reference for watch technicians, collectors, and hobbyists performing repairs, servicing, and assembly work on this caliber. Provides the specific part identification needed to source replacements and understand the movement's construction.
Seiko B200A Digital Watch Parts Catalogue & Technical Guide
Seiko B200A digital watch module parts catalogue and technical guide. Provides complete technical specifications including module size (Ø18.7 mm, H4.5 mm), display medium (Nematic Liquid Crystal, FEM), and features (time display with 12/24-hour indication, stopwatch, alarm display, alarm test system, hourly time signal, automatic calendar). Includes detailed itemized parts breakdown with component identifiers, assembly diagrams, and complete disassembly and reassembly procedures. Battery specifications: SEIKO SR726W or Maxell SR726W, approximately 2 years life at 1.55V. Essential reference for service technicians and repair professionals working on Seiko B200A digital watch modules.
Seiko C439A Digital Quartz Watch Parts List
Seiko C439A digital quartz watch parts list with detailed exploded diagrams showing component assembly and disassembly order. Covers all internal movement components with corresponding part numbers for accurate replacement and service. Includes battery specifications for the Toshiba SR1130W silver oxide cell. Essential reference for watch technicians and repair professionals working on this movement model. Useful for parts ordering, troubleshooting, and workshop manual applications.
Seiko CAL V301A and CAL V329A Parts List and Dial Guide
Comprehensive parts list and dial guide for Seiko CAL V301A and CAL V329A quartz watch movements. Includes detailed exploded-view illustrations of all internal components — wheels, pinions, battery contacts, and setting mechanisms — essential for service technicians and watchmakers performing repair or maintenance work. The dial specifications table covers crown positions, calendar frame configurations, and dial layouts across multiple model variants. Technical characteristics for both calibers are clearly outlined: V301A measures Ø 15.3 x 17.8 mm with 2.3 mm height and one jewel, while the V329A incorporates an electronic circuit reset switch and second-hand setting device. This workshop manual provides the exact component breakdown and dimensional references needed for accurate parts identification, movement assembly, and troubleshooting during service procedures.
Seiko Cal. 1E20A Quartz Watch Parts Catalogue
Comprehensive parts catalogue for the Seiko Cal. 1E20A quartz movement, providing detailed technical drawings and numbered part references essential for watch repair and maintenance. This parts list covers all movement components—gears, springs, screws, contacts, and mechanical assemblies—making it an indispensable resource for watchmakers, technicians, and serious hobbyists performing service work on this caliber. The technical illustrations and part identification system enable accurate sourcing and correct reassembly during repair or restoration procedures.
Seiko Cal. 1F20A Movement Parts Catalogue & Technical Guide
Complete parts catalogue and technical service guide for the Seiko Cal. 1F20A quartz watch movement. This workshop manual covers full movement specifications, detailed exploded diagrams with comprehensive parts numbering, step-by-step disassembly and reassembly procedures, precision lubrication instructions, and technical documentation on circuit block structure and component installation. An essential reference for watchmakers and technicians working on this Seiko quartz caliber.
Seiko Cal. 2104A Parts List and Specifications
Seiko Cal. 2104A Parts List and Specifications — comprehensive parts identification document for the Seiko 2104A movement. Includes exploded diagram with part numbers, dimensional specifications (17.80 x 15.30 mm case, 4.40 mm maximum height), and operating frequency of 19,800 vibrations per hour. This manual covers the manual-wind movement with sweep second hand, detailing the barrel bridge, train wheels, escapement assembly, regulator, and associated screws and jewels. Cross-references the base caliber 21A 17J model for additional specifications. Essential reference for watchmakers and technicians performing maintenance, repair, or restoration work on Seiko 2104A timepieces.
Seiko Cal. 2419A Parts List and Technical Data
Comprehensive parts list and technical data for the Seiko caliber 2419A watch movement. Provides exact specifications including case diameter of 24.00 mm, maximum height of 4.58 mm, and operating frequency of 28,800 vibrations per hour. Features a complete parts nomenclature with manufacturer part numbers, enabling accurate identification and sourcing of all components. The document includes technical remarks on winding stem selection, date dial configuration options, and holding ring specifications, supported by detailed technical diagrams. Essential reference for watchmakers performing repair, maintenance, or restoration work on this caliber.
Seiko Cal. 2B20A Parts Catalogue and Technical Guide
Parts catalogue and technical guide for the Seiko Cal. 2B20A quartz watch movement. This service manual provides everything needed for professional watchmaking repair and maintenance of this calibre. It includes complete specifications, step-by-step disassembly and reassembly procedures, detailed parts list with exploded diagrams for component identification, lubrication point mapping and techniques, resistance and current consumption testing procedures for the coil block, and circuit block architecture. The movement features a step motor driving 2 hands with 20-second hand motion, operates on 1.55V battery power, and delivers monthly rate accuracy of less than 20 seconds. An essential workshop reference for technicians servicing this popular quartz calibre.
Seiko Cal. 2B31A Parts Catalogue and Technical Guide
Seiko Cal. 2B31A parts catalogue and technical guide for quartz watch movement servicing. Specifications document a 13.0–15.5 mm outside diameter, 15.1 mm casing diameter, and 2.4 mm movement height, with 3-hand time indication driven by step motor and electronic circuit reset switch architecture. The guide includes train wheel setting device details, 1 jewel bearing configuration, and a comprehensive exploded-view diagram with all numbered parts for reference during workshop repair. Disassembly and reassembly procedures are fully documented with precise lubrication schedules using Moebius A and SEIKO Watch Oil S-6, making this an essential service manual for technicians working on this movement in professional repair environments.
Seiko Cal. 2E20B Parts Catalogue and Technical Guide
Seiko Cal. 2E20B quartz watch movement parts catalogue and technical service guide covering the complete step motor mechanism with fixed-width pulse system. Provides full movement specifications including 15.5 mm diameter, 2.2 mm height, single jewel, and 1.55V battery requirements. Contains exploded diagrams showing all internal movement components, comprehensive parts list with manufacturer reference numbers, train wheel setting device configuration, and electronic circuit reset switch operation. Specifications confirm 2-hand movement architecture with 20-second interval stepping and monthly rate accuracy within 15 seconds across the normal temperature operating range. Essential reference for watch technicians and repair professionals working with this Seiko quartz caliber.
Seiko Cal. 2K00A Parts Catalogue and Technical Guide
Seiko Cal. 2K00A parts catalogue and technical repair guide for quartz watch movements. This workshop manual provides detailed specifications and exploded views of all movement components, essential for technicians performing disassembly and reassembly. Includes step-by-step lubrication instructions with precise oil types and application quantities. Complete parts list cross-referenced with official Seiko reference numbers and screw specifications for accurate reassembly. Also contains a circuit block structure diagram showing the electronic architecture, technical procedures for coil block resistance measurements and current consumption data, enabling proper diagnostic verification during service and maintenance operations.
Seiko Cal. 2K01A Parts Catalogue and Technical Guide
Seiko Cal. 2K01A parts catalogue and technical service manual for this quartz movement. Provides comprehensive specifications alongside detailed exploded diagrams with numbered components for exact identification. Covers complete disassembly and reassembly procedures, circuit block structure diagram, and critical guidance on winding stem installation, train wheel setting lever adjustment, and train wheel bridge positioning. Features lubrication guidelines for proper maintenance, a complete list of screws with specifications, and electrical value checking parameters essential for workshop repair and calibration work.
Seiko Cal. 2P20A Parts Catalogue and Technical Guide
Complete parts catalogue and technical guide for the Seiko Cal. 2P20A quartz movement, essential for watchmakers and technicians performing service and repair work. This workshop manual provides detailed specifications, comprehensive disassembly and reassembly procedures with a fully numbered exploded parts diagram, precise lubrication instructions, and critical assembly notes. The movement features a two-hand configuration with 20-second step motor drive, train wheel setting device, and electronic circuit reset switch. Movement dimensions: 13.0–15.5mm diameter, 1.8mm height. Operates on SEIKO SR516SW or Maxell SR516SW batteries (1.55V, 3-year service life). The movement incorporates 2 jewels and includes full electronic circuit reset capability for maintenance and troubleshooting.
Seiko Cal. 2P21A Movement Parts Catalogue and Technical Guide
Seiko Cal. 2P21A quartz movement parts catalogue and technical service manual. Provides complete specifications and detailed parts list with exploded diagrams for all components of this precision quartz movement. Covers assembly and disassembly procedures with step-by-step guidance for technicians. Includes circuit block structure documentation, installation remarks for hands, dial, circuit block cover and winding stem, and train wheel bridge calibration settings. Features value checking parameters essential for workshop maintenance, including coil block resistance standards and current consumption specifications. A comprehensive workshop reference for professional watch repair and movement servicing.
Seiko Cal. 2Y00A Parts Catalogue and Technical Guide
Seiko Cal. 2Y00A parts catalogue and technical service guide for quartz movement repair and maintenance. This comprehensive workshop manual covers the complete 13.0 mm diameter step motor movement with load-compensated driving pulse technology. Includes detailed disassembly and reassembly procedures, exploded parts diagram with numbered components for precise identification, lubrication instructions for optimal performance, electronic circuit reset switch operation, train wheel setting device adjustment, and value checking data for troubleshooting. Movement achieves less than 20 seconds monthly rate variation. Features technical specifications, circuit block structure documentation, and all parts reference information needed for professional service and repair work. Essential reference for watchmakers and technicians working with this Seiko quartz caliber.
Seiko Cal. 2Y01A Quartz Movement Parts Catalogue
Complete parts catalogue and technical service guide for the Seiko Cal. 2Y01A quartz watch movement. This workshop manual provides detailed specifications, a fully annotated exploded diagram showing every numbered component, step-by-step disassembly and reassembly procedures, and comprehensive circuit block architecture documentation. The parts list includes all official part numbers for sourcing replacements. Technical coverage encompasses the stepper motor drive system, electronic circuit reset mechanism, train wheel positioning assembly, and battery life indicator function. Key specifications: 15.5mm overall diameter, 2.2mm height, three-hand display configuration, powered by SR521SW battery. An essential reference for watch repair technicians and movement servicing professionals working with this caliber.
Seiko Cal. 3M22A Movement Parts Catalogue and Technical Guide
Comprehensive parts catalogue and technical guide for the Seiko Cal. 3M22A quartz watch movement. This service manual provides detailed movement specifications including 24.0mm outside diameter, 23.3mm casing diameter, 4.2mm height, three-hand configuration, and step motor drive with 7 jewels. Features complete documentation of the automatic generating system utilizing an SL621 capacitor with 0.5–2.3V operating range and approximately 72 hours of battery life. Includes exploded parts diagrams with clearly numbered components, systematic disassembly and reassembly procedures, and comprehensive lubrication guidance specifying Mobius A and SEIKO Watch Oil S-6 for proper maintenance. Essential reference for watchmakers and technicians performing repair, restoration, and routine servicing of this movement.
Seiko Cal. 3M22A Parts Catalogue and Technical Guide
Complete parts catalogue and technical service manual for the Seiko Cal. 3M22A quartz movement. This workshop guide provides detailed specifications, exploded diagrams of all movement components, comprehensive parts listing with factory reference numbers, step-by-step lubrication protocols, and full assembly and disassembly procedures. Covers maintenance, regulation, and adjustment techniques for this dual-motor stepping system with integrated date calendar, power reserve indicator, and automatic generation capability. Essential reference for watchmakers and repair technicians servicing this caliber.
Seiko Cal. 3M62A Parts Catalogue and Technical Guide
Seiko Cal. 3M62A Parts Catalogue and Technical Guide — complete service documentation for the automatic kinetic movement with 7 jewels. This repair manual covers all essential specifications: movement dimensions (Ø24.0 mm outside diameter, Ø23.3 mm casing diameter, 4.2 mm height), 3-hand display with step motor using load-compensated driving pulse design. The workshop manual includes full exploded diagrams with part numbers for systematic disassembly and reassembly, detailed lubrication procedures specifying exact oil grades (Moebius A, Moebius F, SEIKO Watch Oil S-6), and comprehensive technical data on the automatic generating system, power reserve indicator operation, energy depletion forewarning function, overcharge prevention circuit, and date calendar mechanism. Essential reference for technicians performing maintenance, overhaul, or component replacement on this kinetic movement platform.
Seiko Cal. 3Y02A, 3Y03A, 3Y09A Parts Catalogue & Technical Guide
Comprehensive parts catalogue and technical service guide for Seiko Cal. 3Y02A, 3Y03A, and 3Y09A quartz movements. This workshop manual covers complete movement specifications, detailed disassembly and reassembly procedures with numbered component diagrams, proper lubrication protocols for all mechanical parts, circuit block architecture, battery configuration settings, and parts interchangeability charts across movement variants. Includes technical illustrations of mechanical assemblies and electronic circuit layouts essential for repair and maintenance work.
Seiko Cal. 4205A 17-Jewel Diver's Watch Parts List
Comprehensive parts list and technical reference for the Seiko caliber 4205A 17-jewel diver's watch. This service manual provides a detailed parts diagram with numbered components covering the entire movement—barrel and mainspring, train wheels, jeweled pallets, escapement assembly, balance wheel and hairspring, case components, and dial elements. The documentation includes technical specifications for setting levers, date dial configurations, date guard variations, and tube dimensions for bridge screws. Essential for watchmakers, service technicians, and horologists performing movement disassembly, repair, or parts identification on this robust diving watch caliber.
Seiko Cal. 4205B, 4206B, 4207B Parts Catalogue & Technical Guide
Complete parts catalogue and technical workshop guide for Seiko automatic watch movements Cal. 4205B, 4206B, and 4207B. Provides exact movement specifications (17.5mm outer diameter, 17.2mm case diameter, 5.6mm height, 21,600 beats per hour, 17–21 jewels) essential for service and repair work. Features comprehensive numbered parts diagrams with full component listings and screw torque data, step-by-step disassembly and reassembly procedures with proper lubrication points and techniques, and detailed assembly notes for technicians. Covers dial guards, date wheel mechanisms, balance assembly configurations, and automatic winding systems. Indispensable reference for watch repair professionals and experienced hobbyists working on these three calibers.
Seiko Cal. 4205B, 4206B, 4207B Parts Catalogue/Technical Guide
Seiko Cal. 4205B, 4206B, 4207B Parts Catalogue and Technical Guide — a comprehensive service reference for professional watchmakers and technicians working with these popular automatic movements. This workshop manual covers specifications, disassembly and reassembly procedures illustrated with numbered parts diagrams, detailed component drawings, and complete technical data. Movement specifications include 17.5 mm outside diameter, 17.2 mm casing diameter, and 5.6 mm height; all three calibers feature three-hand time indication, automatic winding with manual hand-wind capability, and 21,600 vibrations per hour (6 beats per second). The calendars differ by model: 4205B offers date-only function with 17 jewels; 4206B and 4207B both include day-and-date complication, with 4206B carrying 17 jewels and 4207B fitted with 21 jewels for higher accuracy. The guide provides detailed parts lists keyed to exploded diagrams, step-by-step disassembly and reassembly figures, lubrication specifications for each component, and practical technical notes essential for correct service intervals and repair work.
Seiko Cal. 4F32A, 8F32A, 8F33A, 8F35A Parts Catalogue & Technical Guide
Complete parts catalogue and technical service guide for Seiko quartz watch movements Cal. 4F32A, 8F32A, 8F33A and 8F35A. This repair manual provides detailed exploded diagrams and comprehensive parts lists with reference numbers for accurate component identification and ordering. Includes step-by-step disassembly and reassembly procedures, circuit block schematics for troubleshooting, battery replacement instructions, and hand installation techniques. Technical specifications cover component height discrimination tables, lubrication requirements for movement maintenance, and guidance on movement holders. An essential workshop manual for watch repair technicians and experienced enthusiasts working with these four-digit and eight-digit caliber movements.
Seiko Cal. 4F56A, 8F56A Parts Catalogue & Technical Guide
Seiko Cal. 4F56A and 8F56A parts catalogue and technical guide covering both quartz watch movements. This document provides complete technical specifications including movement size dimensions (Ø18.5 mm for 4F56A, Ø26.4 mm for 8F56A), time indication systems with 24-hour hand, and dual driving systems featuring a step motor and ultrasonic motor for calendar indication. Additional mechanisms include perpetual calendar up to February 28, 2100, train wheel setting device, electronic circuit reset switch, and battery life indicator. Includes exploded component diagrams identifying all major parts with lubrication specifications, battery types (Sony CR1612/Matsushita CR1612 for 4F56A, Matsushita CR2412 for 8F56A), regulation system details, and jewel count (4 jewels). Technical data covers annual rate accuracy, measuring gate specifications, and all caliber-specific technical parameters.
Seiko Cal. 4K24A Parts Catalogue and Technical Guide
Complete parts catalogue and technical guide for the Seiko Cal. 4K24A quartz movement, serving as an essential service manual for watchmakers and technicians. Covers detailed specifications, systematic disassembly and reassembly procedures, comprehensive parts diagram with numbered components, and lubrication instructions essential for proper maintenance. Includes technical remarks on the moon phase indicator mechanism, date dial guard unit assembly, train wheel bridge positioning, and battery installation protocols. Movement specifications: 17.6mm outside diameter, step motor with load-compensated driving pulse, numerical date calendar and moon phase display, approximately 2-year battery life. This workshop manual provides the depth of technical information needed for accurate repair, adjustment, and parts replacement work on this caliber.
Seiko Cal. 4K25A & 4K26A Parts Catalogue and Technical Data
Technical data and parts catalogue for Seiko quartz movements Cal. 4K25A and 4K26A. This comprehensive reference documents movement specifications, parts listings with detailed exploded views, and technical data for these popular quartz calibres. Movement size: Ø17.1mm casing diameter, 2.8mm height. Features load-compensated step motor driving, 4-hand configuration with either date hand (4K25A) or day hand (4K26A), instant calendar setting mechanism, and 1.55V battery (SR621SW type). Includes lubrication guidelines, circuit block components, and complete parts identification with reference numbers. Essential technical reference for watchmakers and technicians working with these Seiko quartz movements.
Seiko Cal. 4M21A Parts Catalogue and Technical Guide
Complete parts catalogue and technical guide for the Seiko Cal. 4M21A automatic watch movement. This workshop manual provides detailed component specifications, part number identification, and exploded diagrams essential for service and repair work. Coverage includes the oscillating weight assembly, capacitor unit, circuit block, generating rotor, train wheel set, and setting mechanism. Technical sections address lubrication requirements, resistance measurements, current consumption data, and procedures for checking the automatic generating system. Ideal for watchmakers performing maintenance or rebuilding operations on this movement.
Seiko Cal. 4M21A Supplement Vol. 2 - Power Resource & Parts
Seiko Cal. 4M21A Supplement Vol. 2 is a technical parts catalogue detailing power supply modifications to this quartz movement. The document covers the transition from original capacitor units to the new rechargeable battery unit (3027 29R), including comparative performance data and detailed parts specifications with visual diagrams. The parts list identifies original capacitor units (3029 114, 3029 116), the capacitor/battery clamp assembly (4225 552), and the replacement rechargeable battery unit complete with discrimination markings for proper identification.
Seiko Cal. 4M21A Supplement Vol. 2 - Power Resource Change
Seiko Cal. 4M21A Supplement Vol. 2 – Power Resource Change is a technical guide documenting the transition from original capacitor units to Seiko's new rechargeable battery technology for kinetic watches. This supplement clarifies the engineering shift affecting service and repair work on these movements. The guide compares the discontinued capacitor units (3029 114 and 3029 116) against the replacement rechargeable battery unit (3027 29R), presenting performance data including charge duration and swing counts so technicians understand the behavioral differences between old and new power resources. A detailed parts list with visual diagrams identifies the capacitor clamp and rechargeable battery clamp assembly (4225 552), showing how component markings distinguish between the two versions. Compatibility notes and mandatory replacement procedures ensure correct installation during service, preventing mismatches that could compromise movement function. Essential for watch repair professionals servicing 4M21A kinetic watches and troubleshooting power-related issues.
Seiko Cal. 4N00B, 4N20B, 4N01B Parts Catalogue and Technical Guide
Seiko Cal. 4N00B, 4N20B, and 4N01B quartz watch movement parts catalogue and technical service guide. This workshop manual provides detailed specifications, exploded component diagrams with part numbers, step-by-step disassembly and reassembly procedures, and lubrication protocols for routine maintenance. Covers all major assemblies including hands, dial, gear trains, rotor assembly, coil block, battery connections, and mainplate, along with circuit block architecture and essential value-checking parameters for technicians performing movement repair and overhaul.
Seiko Cal. 4S15A Movement Parts Catalogue & Technical Guide
Complete technical reference and parts catalogue for the Seiko Cal. 4S15A automatic movement. This workshop manual covers all specifications for this 26.0mm diameter movement (25.6mm casing diameter, 4.17mm height) with 25 jewels and 28,800 vibrations per hour beat rate. Includes detailed exploded diagrams identifying each principal component, lubrication schedules with specific oil types and precise application quantities for optimal performance, and step-by-step guidance on disassembly and reassembly procedures. Covers the automatic winding system with manual winding capability, date window mechanism, second-hand setting device, micro-regulating adjustment, and fine-positioning regulator pin. Essential for watchmakers performing maintenance, service work, or complete overhauls on this movement. Helps technicians source correct replacement parts and understand proper assembly sequences.
Seiko Cal. 4S15A Movement Parts Catalogue and Technical Guide
Seiko Cal. 4S15A automatic watch movement parts catalogue and technical guide. Provides detailed specifications for this 26.0 mm diameter movement: 25.6 mm casing diameter, 4.17 mm height, 28,800 vibrations per hour (8 beats per second), three-hand display, and 25 jewels. Exploded diagrams show all numbered components for systematic identification during repair and maintenance. Lubrication instructions cover application of Moebius V and Moebius A oils alongside Seiko Watch Oils S-6, S-4, and S-3 at specific wear points. Comprehensive parts lists detail screws, jewels, tubes, and pins with specifications. Hand installation height discrimination table cross-references movement numerals to correct hand stack positioning. Technical remarks guide disassembly and reassembly procedures with practical notes on critical tolerances. Covers automatic winding mechanism with manual hand-winding option, date calendar module, second-setting device, micro-regulating system, and micro-positioning regulator pin adjustment. Essential reference for service technicians and qualified repair professionals working with this common Seiko movement family.
Seiko Cal. 5421A Quartz Watch Parts Catalogue
Seiko Cal. 5421A quartz watch movement parts catalogue with comprehensive parts list organized by reference numbers. Features detailed exploded views that clearly identify every component in the movement, making it essential for technicians performing repairs, servicing, or replacement work. Each part is labeled with its identification code for quick reference during assembly, disassembly, and troubleshooting. This catalogue serves as the authoritative guide for locating genuine Seiko components and understanding the movement's architecture.
Seiko Cal. 5H22A, 5H23A Parts Catalogue & Technical Guide
Seiko Cal. 5H22A and 5H23A Parts Catalogue and Technical Service Guide covering the complete quartz movement architecture. Provides full specifications, step-by-step disassembly and reassembly instructions, comprehensive parts diagrams with factory part numbers, and precise lubrication guidelines for all wear surfaces. Includes detailed technical notes on critical components such as the intermediate wheel for day correction, the fifth wheel and pinion assembly, and circuit block configuration. Features value checking procedures for coil block resistance and current consumption measurement, essential for verifying movement performance and troubleshooting electrical parameters. A complete workshop manual reference for technicians servicing and maintaining these popular Seiko quartz calibers.
Seiko Cal. 5J22A Kinetic Movement Parts Catalogue & Technical Guide
Parts catalogue and technical guide for the Seiko Cal. 5J22A Kinetic watch movement. This service manual provides comprehensive technical specifications for this 26.4 mm diameter movement standing 3.95 mm tall with 13 jewels. It documents the innovative automatic generating system powered by a titanium lithium ion rechargeable battery, the step motor driving mechanism, and operational features including power save function, time relay function, and date calendar mechanism. Includes detailed technical remarks and repair guidance specific to this Kinetic movement technology, essential reference material for qualified watchmakers and technicians performing maintenance and repair work on this movement.
Seiko Cal. 5J22A Parts Catalogue/Technical Guide
Complete technical reference and parts catalogue for the Seiko Cal. 5J22A kinetic watch movement. This service manual provides essential specifications for the 26.4 mm diameter, 3.95 mm height movement fitted with 13 jewels, an indispensable resource for watchmakers and technicians performing repairs or maintenance on this caliber. The guide covers the proprietary lithium-ion rechargeable battery system with detailed power supply parameters (0.45 V – 2.5 V operating range) and explains how the automatic generating system converts wrist motion into electrical charge. Technical sections address the power save function that extends battery life during periods of inactivity, the time relay function for precise timekeeping, energy depletion forewarning to alert the wearer before power failure, and the overcharge prevention circuitry that protects the battery during extended wear. Includes repair notes and troubleshooting guidance specific to this kinetic caliber, essential for workshop reference and authorized service centers maintaining Seiko kinetic watches.
Seiko Cal. 5J32A Kinetic Watch Parts Catalogue and Technical Guide
Comprehensive parts catalogue and technical service guide for the Seiko Cal. 5J32A Kinetic automatic watch movement. This workshop manual covers all essential specifications and component details needed for repair, maintenance, and troubleshooting of this advanced kinetic timepiece. The guide includes detailed movement specifications (Ø26.4mm, height 4.15mm) and the full range of mechanical and electrical features that define this innovative movement. The 5J32A employs an automatic power-generating system combined with a titanium lithium-ion rechargeable battery, eliminating the need for traditional battery replacement. The movement is fitted with 13 jewels for reduced friction at critical pivot points. Key operational features include an intelligent power save function that extends charge duration, a time relay function for precision regulation, and a date calendar mechanism with instant setting capability. Operating voltage ranges from 0.45V to 2.5V, with the rechargeable battery maintaining approximately 4 years of typical charge duration between full depletions. The step motor driving system utilizes load-compensated driving pulses to optimize accuracy across varying conditions. Monthly timekeeping accuracy exceeds the ±15-second standard, making this movement suitable for precision daily wear. An essential reference for technicians servicing Seiko kinetic movements and for anyone needing detailed parts identification and reassembly procedures.
Seiko Cal. 5J32A Parts Catalogue and Technical Guide
Complete parts catalogue and technical guide for the Seiko Cal. 5J32A kinetic watch movement. This 22-page service manual provides detailed specifications and repair guidance for technicians maintaining and servicing this distinctive movement. Covers precise movement dimensions (Ø26.4 mm, height 4.15 mm), the step motor driving system, and the automatic power-generating mechanism with titanium lithium-ion rechargeable battery. Includes technical information on the power save function, time relay circuitry, and date calendar operation. Contains mechanical specifications for the 13 jewels assembly and comprehensive technical remarks on disassembly, adjustment, and repair procedures. An essential reference for professional watchmakers and technicians working on Seiko kinetic movements.
Seiko Cal. 5J32A Parts Catalogue and Technical Guide
Technical guide and parts catalogue for the Seiko caliber 5J32A Kinetic watch movement. This service manual contains detailed technical specifications for the 5J32A, including movement dimensions (Ø26.4 mm, case Ø25.6 mm, height 4.15 mm) and complete component breakdown. The guide covers the step motor drive system, automatic generating mechanism, date calendar operation, power save function, time relay function, and the titanium lithium ion rechargeable battery rated for approximately 4 years of charge retention. Fitted with 13 jewels and achieving monthly accuracy within 15 seconds, this manual is essential for anyone performing maintenance, repair, or component identification on 5J32A movements. Includes parts list with part numbers and technical data sheets for all major assemblies.
Seiko Cal. 5K25A Parts Catalogue and Technical Guide
Complete parts catalogue and technical guide for the Seiko Cal. 5K25A solar-powered watch movement. This service manual provides detailed specifications and exploded parts diagrams with full part numbers for every component. Step-by-step assembly and disassembly procedures cover hands installation, dial fitting, solar cell unit integration, date dial guard positioning, and rechargeable battery setup. Technical specifications include movement dimensions, driving system architecture, power supply operation, and essential testing methods for coil block resistance and current consumption. An indispensable workshop reference for technicians servicing and repairing this reliable solar movement.
Seiko Cal. 5M22A, 5M23A Parts Catalogue & Technical Guide
Complete parts catalogue and technical service guide for Seiko Cal. 5M22A and Cal. 5M23A automatic watch movements. This workshop manual delivers the reference material you need for repair, maintenance, and reassembly work on these movements. Detailed exploded views show every component with precise part numbering, while assembly procedures and lubrication specifications ensure correct rebuilding. Technical sections cover the step motor driving system, automatic generating mechanism, and circuit block architecture. Includes hand installation height variations and superseded part number corrections for accurate sourcing and replacement. An essential resource for watchmakers and technicians servicing these robust automatic calibres.
Seiko Cal. 5M22A, 5M23A Parts Catalogue and Technical Guide
Parts catalogue and technical guide covering Seiko automatic watch movements Cal. 5M22A and Cal. 5M23A. Includes comprehensive parts lists with numbered diagrams and specifications for both movements, covering the 27.6 mm case diameter, step motor with load-compensated driving pulse circuitry, and automatic generating system design. Provides complete disassembly and reassembly procedures with detailed lubrication instructions for technicians and watchmakers. Technical sections address circuit block structure, hand installation methods, capacitor unit assembly, oscillating weight bridge configuration, train wheel bridge calibration, and adjustment procedures. Also includes resistance values, current consumption data, and systematic verification methods for the automatic generating system. An essential workshop manual for service and repair of these movement calibers.
Seiko Cal. 5M22A/5M23A Supplement - Power Resource Change
Seiko Cal. 5M22A/5M23A power resource supplement — comprehensive parts reference for the transition from original capacitor units to new rechargeable battery technology. This service manual provides technicians and repair shops with comparative performance specifications, detailed parts identification, and full compatibility matrices for clamps and insulators across both generations. Includes technical drawings and parts lists for capacitor units, battery assemblies, clamps, and insulator components, enabling straightforward sourcing and installation during caliber upgrades or service procedures.
Seiko Cal. 5M42A, 5M43A Parts Catalogue and Technical Data
Seiko Cal. 5M42A and 5M43A parts catalogue and technical data for automatic watch movements. Includes comprehensive parts diagrams with numbered components for service and repair work. Movement specifications: 27.6mm outside diameter, 27.0mm casing diameter, 4.3mm height, 3-hand display, step motor with load-compensated driving pulse. Features automatic generating system with power reserve indicator, overcharge prevention circuit, electronic circuit reset switch, and train wheel setting device. The 5M43A variant adds date and day calendar functions. Monthly accuracy specification is less than 15 seconds. Movement rated at 6 jewels with polyacene lithium condenser capacitor operating at 0.5–2.3V and 168-hour charge duration. Requires Moebius A and SEIKO Watch Oil S-6 for proper lubrication. Essential reference for watch technicians and repair specialists working with these automatic calibres.
Seiko Cal. 5M42A, 5M43A Parts Catalogue and Technical Guide
Parts catalogue and technical guide for Seiko automatic watch movements Cal. 5M42A and 5M43A. This service manual covers the complete movement architecture with detailed exploded diagrams showing all component positions and relationships. The parts list references every component by Seiko's factory numbering system for accurate identification during repair and maintenance work. Technical specifications detail the 27.6 mm outside diameter, 4.3 mm height, 6 jewels, and the signature step motor design with load-compensated driving pulse. The repair guide walks through disassembly and reassembly sequences, critical lubrication points and schedules, and includes technical remarks addressing circuit block structure, dial-holding ring installation, oscillating weight adjustment procedure, capacitor unit positioning, train wheel bridge alignment, and electrical resistance measurements. An essential workshop manual for service technicians working with these quartz movements.
Seiko Cal. 5M45A Parts Catalogue and Technical Guide
Comprehensive parts catalogue and technical guide for the Seiko Cal. 5M45A automatic watch movement. This service manual provides detailed component specifications, a fully numbered exploded diagram identifying all 54 parts, and step-by-step disassembly and reassembly procedures essential for workshop technicians. Includes precise lubrication guidance, technical remarks on proper component installation and calibration, and value-checking protocols. Covers the movement's key specifications: 27.6mm diameter case, stepping motor drive system, power reserve indicator mechanism, electronic circuit reset switch, and integrated date calendar function. An indispensable reference for watch repair professionals working on this movement.
Seiko Cal. 5M62A, 5M63A Parts Catalogue / Technical Guide
Complete parts catalogue and technical guide for Seiko calibre 5M62A and 5M63A automatic kinetic movements. Features detailed exploded views and component identification with disassembly and reassembly procedure references. Specifications include lubrication guidelines (Moebius oils and silicone oil 500,000 c.s.), movement dimensions of 27.6mm diameter and 4.3mm height, 6 jewels, step motor drive with load-compensated driving pulse, 0.45V–2.2V operating voltage range, and approximately 6 months power reserve from full charge. Technical documentation covers contact point spring installation, rechargeable titanium lithium ion battery specifications, circuit block layout, and generating coil block details. Essential reference guide for technicians servicing kinetic movement mechanisms.
Seiko Cal. 5P30A, 5P31A, 5P32A, 5P39A Parts Catalogue and Technical Guide
Comprehensive parts catalogue and technical guide for Seiko quartz watch movements Cal. 5P30A, 5P31A, 5P32A, and 5P39A. Provides detailed component identification with part numbers, exploded views of each movement, caliber-specific specifications, and reassembly notes essential for workshop repair and service work. Covers step motor driving systems, calendar mechanisms, circuit block architecture, battery specifications, and value checking procedures. Documents jewel count variations and winding stem configurations across the four calibers, making this service manual indispensable for watchmakers and technicians working with these Seiko movements.
Seiko Cal. 5S21A Movement - Parts Catalog and Technical Guide
Complete parts catalog and technical service guide for the Seiko Cal. 5S21A quartz movement. This workshop manual delivers everything needed for professional repair and maintenance of this caliber: detailed specifications, exploded diagrams with numbered component identification, step-by-step disassembly and reassembly procedures, lubrication mapping for all wear points, and precise installation instructions for hands, dial, circuit block, and train wheel bridge. Dedicated sections cover battery installation technique, viscous rotor unit handling and adjustment, and performance value verification—all the procedures a watchmaker needs to service and regulate this reliable quartz movement back to specification.
Seiko Cal. 5T52A Parts Catalogue and Technical Guide
Seiko Cal. 5T52A parts catalogue and technical service guide for the complete quartz watch movement. This workshop manual supplies detailed exploded views essential for understanding component assembly, full specifications covering dimensions and operational functions including timekeeping, 12-hour alarm, and world time capability across 24 cities, and a comprehensive parts list with factory reference numbers for every component. Step-by-step disassembly and reassembly procedures guide technicians through safe movement servicing, supported by lubrication schedules to maintain precision and longevity. The guide includes technical comparison notes highlighting key differences between the Cal. 5T52A and Cal. 7T32A, helping identify correct parts and procedures. An essential reference for watch repair professionals and enthusiasts performing movement maintenance and restoration.
Seiko Cal. 5Y01A, 5Y02A, 5Y13A Technical Guide
Technical service manual for Seiko quartz watch movements Cal. 5Y01A, 5Y02A, and 5Y13A, covering the complete repair and maintenance workflow. Contains full specifications, circuit block architecture, detailed disassembly and reassembly instructions with component identification, lubrication data, and checking and adjustment procedures. The movements employ a step motor driving system with load-compensated driving pulse technology, essential knowledge for watchmakers performing service work on these calibers.
Seiko Cal. 5Y86A Parts Catalog and Technical Guide
Seiko Cal. 5Y86A parts catalog and technical service guide for the 24.0mm quartz watch movement. This workshop manual provides everything needed for authorized service and repair, including complete movement specifications, exploded diagrams of front and rear assemblies, comprehensive parts list with Seiko part numbers, step-by-step assembly procedures, and detailed lubrication charts. The 5Y86A features a stepper motor with load-compensated driving pulse, dual date and day calendar displays, and an electronic reset switch. Includes electrical test specifications for coil block resistance and current consumption measurements, along with critical disassembly and reassembly notes for technicians. An essential reference for Seiko service centers and experienced watch repair professionals.
Seiko Cal. 5Y88A Parts Catalogue and Technical Guide
Comprehensive parts catalogue and technical service guide for the Seiko Cal. 5Y88A quartz movement, a three-function calendar module featuring date, day, and month displays. This workshop manual delivers detailed movement specifications alongside a fully annotated parts breakdown with numbered component references and exploded assembly views to support both technicians and skilled watchmakers. The guide covers complete disassembly and reassembly procedures, hand installation methods, and precise calendar wheel positioning protocols essential for accurate timekeeping. Lubrication mapping identifies all critical oiling points, while electrical value checking parameters provide reference data for coil block resistance and current consumption verification. Battery specification: SR916SW 1.55V, rated for approximately 3 years of normal service life. Movement dimensions: 24.0mm outside diameter, 3.05mm height. Supplementary technical notes address hand removal techniques, calendar mechanism assembly sequencing, and systematic value checking procedures to ensure proper movement function after maintenance or repair work.
Seiko Cal. 5Y91A Quartz Movement - Technical Data and Parts List
Technical data and parts catalogue for the Seiko caliber 5Y91A quartz movement. This service manual provides detailed specifications for a 15.3mm diameter, 2.9mm height movement with three-hand display and 1-second step motion via stepper motor drive. The documentation includes comprehensive component identification with part numbers—circuit bridge plates, circuit block, train wheel assemblies, rotor and stator assemblies, and all electronic components. Powered by a single SR626SW silver-oxide battery (1.65V, approximately 2 years operating life). The movement features zero jewels construction with no active regulation system and employs a 10-second measuring gate for calibration and diagnostics. Essential reference for technicians performing service, repair, and parts replacement.
Seiko Cal. 6020A Quartz Parts List
Comprehensive parts list and component reference for the Seiko Cal. 6020A quartz movement. This manual identifies every major and minor part with corresponding Seiko part numbers and includes detailed illustrations for accurate component location and assembly reference. Essential for watch technicians, repair professionals, and movement specialists performing maintenance, service repairs, or parts replacement on watches fitted with this caliber. Covers all mechanical and electronic components with visual diagrams to support proper parts sourcing and reassembly procedures.
Seiko Cal. 6119A Parts List and Exploded Views
Technical parts reference for the Seiko caliber 6119A automatic wristwatch movement. This service documentation provides detailed exploded views and a comprehensive parts list essential for watchmakers and technicians servicing this movement. Specifications include 27.00 mm case diameter, 5.15 mm height, and 21,600 vibrations per hour beat rate. The parts list covers all major assemblies: barrel and gear train, wheels, escapement mechanism, balance assembly, dial components, hands, and all auxiliary mechanisms. Each part is numbered for precise identification during disassembly, inspection, and reassembly. Ideal for professional repair, restoration, and maintenance of Seiko 6119A movements.
Seiko Cal. 6347A Technical Guide and Parts Catalog
Technical guide and parts catalog for the Seiko Cal. 6347A, a 23-jewel automatic quartz movement engineered for precision timekeeping. Complete specifications document the movement's 27.0mm casing diameter and 5.8mm height, operating at 21,600 vibrations per hour. Covers all core functions: automatic winding with sweep seconds hand, date window with instant-set capability, moon phase indicator with rapid adjustment, and Diashock shock resistance. The comprehensive parts catalog provides systematic identification and numbering for every component—barrels, wheels, bridges, jewels, springs, and the specialized moon phase mechanism assembly. Detailed exploded-view diagrams illustrate component relationships and exact assembly positions, essential reference material for technicians performing service work, repair procedures, or replacement part ordering on this movement model.
Seiko Cal. 6A32A Parts Catalogue and Technical Guide
Complete parts catalogue and technical guide for the Seiko Cal. 6A32A quartz watch movement. This service manual provides a detailed parts list of all 44 components, with step-by-step disassembly and reassembly instructions annotated with lubrication points and precise installation positions. Exploded diagrams cover hand removal, dial removal, wheel assembly, circuit block installation, and switching mechanism configuration. Movement specifications: 27.8mm diameter, stepper motor drive system, fully automatic calendar function, 1.55V silver oxide battery rated for 4-year service life, and monthly accuracy within 20 seconds. An essential reference for watchmakers and technicians performing maintenance or repair work on this calibre.
Seiko Cal. 6A32A Technical Guide and Parts Catalogue
Technical guide and parts catalogue for the Seiko Cal. 6A32A quartz movement. Covers movement specifications including the automatic calendar system, step motor mechanism, and fully automatic date indication. Details crown operation settings, battery requirements, and timing calibration. Features a comprehensive parts identification diagram with component references for hands, dial, date dial guard, date wheel, hour wheel, 24-hour wheel, and date driving wheel — essential for technicians servicing or repairing watches fitted with this movement.
Seiko Cal. 6F22A 6F29A Parts Catalogue Technical Guide
Comprehensive parts catalogue and technical guide for Seiko Cal. 6F22A and Cal. 6F29A quartz movements. This service manual covers full specifications, detailed parts list with numbered exploded diagrams for accurate component identification, and step-by-step assembly and disassembly procedures. Includes essential guidance on moon phase corrector handling, train wheel setting lever positioning, circuit block resistance specifications, and current consumption data. Designed for these stepper motor-driven movements featuring moon phase display, numerical date calendar, and electronic circuit reset functionality. An indispensable workshop reference for technicians servicing or restoring these movements.
Seiko Cal. 6F25A & 6F26A Parts Catalogue and Technical Guide
Seiko Cal. 6F25A & 6F26A Parts Catalogue and Technical Guide — complete reference documentation for these quartz watch movements. The manual provides a comprehensive parts list with numbered exploded diagrams for systematic identification and ordering, alongside full specifications for both caliber variants. Technical details cover the step motor movement design, integrated date and day calendar mechanisms (depending on model), case compatibility from 19–22 mm diameter watches at 2.7 mm thickness, and the four-hand configuration with either date or day subdial. Battery specification is 1.55 V with approximately five years typical lifespan, and the movement houses 2 jeweled bearings. The guide includes lubrication schedules and oil recommendations — Moebius A and SEIKO Watch Oil S-6 — essential for long-term accuracy and reliability. Disassembly and reassembly procedures are referenced throughout, making this manual indispensable for service technicians, watchmakers, and movement specialists performing maintenance or component replacement on these models.
Seiko Cal. 6M13A Parts Catalogue and Technical Guide
Complete parts catalogue and technical guide for the Seiko Cal. 6M13A quartz movement. Features detailed specifications, fully annotated exploded diagrams showing all movement components, and comprehensive parts lists cross-referenced with genuine part numbers. Covers battery installation and replacement, complete movement service and rebuild, lubrication specifications for each component, and precise assembly instructions for the date dial mechanism, mode indicator, winding stem, and clutch wheel. An essential workshop manual for technicians servicing or restoring Seiko watches fitted with this movement.
Seiko Cal. 6M15A, 6M91A Parts Catalogue and Technical Guide
Seiko Cal. 6M15A and Cal. 6M91A quartz watch movement parts catalogue and technical repair guide. This comprehensive workshop manual covers complete disassembly and reassembly procedures, detailed specifications, mode indicator installation, switch spring screw positioning, coil block resistance and current consumption verification, time accuracy measurement techniques, and fully illustrated parts diagrams with numbered components for systematic identification and ordering. The 6M15A incorporates a 4-piece step motor with world time and stopwatch functionality, while the 6M91A features a 3-piece step motor with dual time display and automatic calendar complication. Essential reference for service technicians and watchmakers performing maintenance, repairs, or restoration work on these Seiko quartz calibers.
Seiko Cal. 6M23A Parts Catalogue
Seiko Cal. 6M23A quartz movement parts catalogue with complete technical specifications. This manual provides the detailed component breakdown and assembly information needed for service and repair work on this multi-function movement. Covers all mechanical and electrical specifications including precise dimensions, time indication systems, and step motor driving mechanism (four pieces, 1.55V battery powered). Documents the 9-jewel escapement design and includes dedicated sections on proper lubrication practices throughout the movement. The Cal. 6M23A features a 24-hour hand, mode indicator, alarm complication, 1/10 second stopwatch function, automatic date calendar, dual time capability, and zero-reset adjustment. The parts catalogue details two distinct case structure configurations with full assembly guidance for each. Essential reference for watch technicians performing movement maintenance, component replacement, or case assembly work.
Seiko Cal. 6M25A Parts Catalogue and Technical Guide
Comprehensive parts catalogue and technical guide for the Seiko Cal. 6M25A quartz watch movement. This workshop manual provides everything needed to service, repair, and maintain this multi-function timepiece, including complete movement specifications, detailed parts list with numbered exploded diagrams for component identification, full disassembly and reassembly procedures, and essential technical remarks. The movement features a 3-hand time display with mode indicator, precision step motor, 12-hour alarm, countdown timer, stopwatch, month and date display with automatic calendar correction, hands 0-reset adjustment, integrated alarm test system, and electronic circuit reset switch. Battery specifications: SEIKO SR927W, Maxell SR927W, SONY SR927W, or EVEREADY 399 (approximately 2 years operating life). Operating voltage: 1.55V. Movement grade: 9 jewels. An essential reference for professional watchmakers and technicians servicing this caliber.
Seiko Cal. 6M25A Parts Catalogue and Technical Guide
Complete parts catalogue and technical guide for the Seiko Cal. 6M25A quartz movement. This service manual delivers everything a technician needs for disassembly, repair, and reassembly, with detailed numbered diagrams guiding each step. Comprehensive lubrication instructions ensure proper function after work, while battery specifications and handling notes cover the SR927W power cell and its approximately 2-year service life. Detailed installation remarks address critical components including hands, mode indicator, dial, winding stem, clutch wheel, switch spring, and coil block spacer. The Cal. 6M25A features a 3-hand time display, 12-hour alarm function, countdown timer, stopwatch, month/date automatic calendar, and demonstration mode. Movement dimensions are 26.4mm diameter by 3.9mm height with 9 jewels. An essential workshop reference for quartz watch repair and maintenance.
Seiko Cal. 6M26A Parts Catalogue and Technical Guide
Seiko Cal. 6M26A Parts Catalogue and Technical Service Guide for quartz watch movements. This comprehensive workshop manual covers the step motor mechanism in detail, providing specifications alongside complete disassembly and reassembly procedures essential for professional repair and maintenance. The parts catalogue includes exploded component diagrams matched to an organized parts list, making identification and ordering straightforward. Lubrication guidelines specify the correct application points and compounds for reliable long-term performance. Technical instructions walk through circuit block structure, battery installation procedures, and proper component assembly sequencing. Supports the 3-hand time display with mode indicator wheel, countdown timer, stopwatch, and calendar functions. A valuable reference for watchmakers and technicians performing service work on this movement.
Seiko Cal. 7002A Parts Catalogue and Technical Guide
Complete parts catalogue and technical guide for the Seiko Cal. 7002A automatic wristwatch movement. This workshop manual provides detailed specifications: Ø27.4mm outside diameter, Ø27.0mm casing diameter, 4.9mm height, 21,600 vibrations per hour, and 17 jewels. The exploded-view diagram identifies all components with part numbers for quick recognition during service. A comprehensive parts list organized by category streamlines ordering replacements. Lubrication specifications for individual components ensure proper maintenance and longevity. Disassembly and reassembly procedure references guide technicians through movement servicing—an essential resource for watchmakers and service professionals.
Seiko Cal. 7002A Technical Data & Parts List
Seiko Cal. 7002A automatic watch movement technical data and parts catalogue. Provides complete specifications including Ø27.4mm (casing), Ø27.4mm (outside diameter), 4.9mm height, 21,600 vibrations per hour, and 17 jewels. Features a detailed exploded view diagram identifying all components with numbered callouts for quick reference. Includes disassembly/reassembly procedure references (Figs. 1-46) and specific lubrication recommendations for critical moving parts using Mobius A, SEIKO Watch Oil S-4, and SEIKO Watch Oil S-6. The parts list organizes every component by category—screws, jewels, tubes, and miscellaneous hardware—making it straightforward to identify and source replacements. Essential technical reference for watch technicians and service personnel working on this widely-serviced automatic caliber.
Seiko Cal. 7009A Movement Parts Catalog and Technical Guide
Complete parts catalog and technical guide for the Seiko Cal. 7009A automatic watch movement. This workshop manual provides detailed exploded views with numbered components, comprehensive parts lists organized by category (screws, jewels, tubes, and miscellaneous parts), and step-by-step assembly and disassembly instructions. Specifications cover the 27.4mm diameter movement fitted with three hands, an integrated day-date calendar mechanism, and an automatic winding system. The guide includes lubrication specifications for various oil grades applied to different assemblies, plus in-depth technical notes on critical components such as the oscillating weight, reduction wheel train, barrel bridge assembly, and winding stem removal procedures tailored to different case configurations. An essential service manual and repair reference for technicians working on this widely-used movement.
Seiko Cal. 7009A Parts Catalogue and Technical Guide
Seiko Cal. 7009A parts catalogue and technical guide for the automatic wristwatch movement—the essential workshop manual for technicians and horologists servicing this classic caliber. Provides detailed exploded views of every component, comprehensive parts lists with factory part numbers, and step-by-step assembly and disassembly procedures. Movement specifications: 27.4 mm diameter, 21,600 vibrations per hour, 17 jewels, with calendar window, day-date display, and instant calendar-setting mechanism. Includes lubrication guidance with precise oil type specifications and numbered technical figures to guide reassembly. This service manual ensures accurate repairs and prevents costly errors during movement work.
Seiko Cal. 7320A Parts List and Technical Data
Complete parts list and technical data for the Seiko Cal. 7320A quartz movement. This service reference includes detailed exploded view diagrams with part numbers for over 40 components—wheels, levers, springs, battery connectors, circuit block, and rotor-stator assembly. Essential specifications: 15.1mm case diameter, 1.8mm maximum height without battery, 5 jewels, 32,768 Hz quartz crystal oscillator, 2-pole step motor drive system, and regulating switch lever adjustment mechanism. Also documents component variations and battery requirements, making it an indispensable workshop manual for anyone servicing or repairing this common quartz caliber.
Seiko Cal. 7454A Parts Catalogue
Seiko Cal. 7454A quartz watch movement parts catalogue with comprehensive exploded view diagrams. This reference covers all major mechanical and electromechanical assemblies: moon phase unit, date dial mechanism, train wheels, battery connections, clutch wheel, and setting lever assembly. Each component is assigned a detailed part number for accurate ordering and identification. An essential workshop manual and repair reference for technicians servicing this popular mid-range quartz calibre, enabling quick parts lookup and assembly verification during maintenance or restoration work.
Seiko Cal. 7A48A Quartz Movement Parts List
Complete parts list and detailed assembly diagram for the Seiko Cal. 7A48A quartz watch movement. This service manual covers all individual components and subassemblies with numbered references corresponding to the technical parts diagram—essential for maintenance, repairs, or restoration work on this movement. Watchmakers and enthusiasts alike will find the comprehensive breakdown invaluable for accurate parts ordering and assembly procedures.
Seiko Cal. 7C17A Quartz Movement Parts Catalogue
Parts catalogue and technical guide for the Seiko Cal. 7C17A quartz movement, essential for watchmakers and technicians servicing this step-motor-driven mechanism. The manual covers complete specifications, exploded component views, and a detailed parts list with factory reference numbers for accurate component identification and ordering. Includes step-by-step disassembly and reassembly procedures, lubrication guidelines for optimal performance, and technical notes addressing coil block structure, dial settings, winding stem installation, and time accuracy adjustment. Designed for 2-hand configurations with 7 jewels and SR43 battery operation. This workshop manual provides the technical foundation needed for reliable repair and maintenance of this widely used Seiko quartz caliber.
Seiko Cal. 7C43A, 7C46A Parts Catalogue and Technical Guide
Comprehensive parts catalogue and technical guide for Seiko Cal. 7C43A and 7C46A quartz watch movements. This workshop manual provides detailed specifications and exploded views of the setting mechanism and gear train, with individually numbered components and assembly cross-references to simplify disassembly and reassembly. Lubrication guidance covers proper application to critical points throughout the movement. A circuit block structure diagram clarifies the electronic layout, while step-by-step procedures walk through the complete service sequence. Detailed remarks address specific assemblies including the dial, date dial guard, intermediate wheel for day correction, train wheel setting lever, and center wheel bridge. Valve checking data ensures proper function, and time accuracy adjustment instructions enable precise regulation. This repair manual serves both experienced watchmakers and technicians new to these reliable movements.
Seiko Cal. 7D48A Parts Catalogue and Technical Guide
Complete parts catalogue and technical guide for the Seiko Cal. 7D48A automatic generating system quartz watch movement. This service manual provides detailed specifications and functional descriptions of the power save and time relay systems, perpetual calendar operation, and step-by-step assembly diagrams with numbered component identification. Exploded views illustrate the internal architecture of key subassemblies including the step motors, piezoelectric motor for calendar advancement, rechargeable battery unit, and calendar mechanism wheels. An essential reference for technicians performing maintenance, repair, or complete movement overhaul on this hybrid mechanical-quartz caliber.
Seiko Cal. 7D48A Parts Catalogue and Technical Guide
Seiko Cal. 7D48A Parts Catalogue and Technical Guide — comprehensive parts list and service manual for the Seiko Cal. 7D48A automatic generating system quartz watch movement. This technical guide includes detailed movement specifications, functional descriptions of power save and time relay systems, perpetual calendar operation principles, and assembly diagrams with numbered component references essential for repair and maintenance work. Features exploded views of the complete movement architecture, case back assembly procedures, and calendar mechanism components, plus technical remarks and troubleshooting guidance for technicians performing service or restoration on this movement.
Seiko Cal. 7F22A, 7F24A, 7F26A, 7F27A Parts Catalogue and Technical Guide
Comprehensive parts catalogue and technical service guide for Seiko quartz watch movements Cal. 7F22A, 7F24A, 7F26A, and 7F27A. Provides complete specifications, detailed exploded views cross-referenced with part numbers, lubrication schedules specifying types and quantities for each assembly, and step-by-step disassembly and reassembly procedures. Covers load-compensated step motor driving technology, 3-hand and 2-hand dial configurations, and calendar mechanism variants across the model range. Includes comparative notes highlighting mechanical and functional differences between calibers to aid technicians in servicing multiple variants from the same family. An essential workshop manual for professional watch repair and routine maintenance of these popular Seiko quartz movements.
Seiko Cal. 7F32A Parts Catalogue and Technical Guide
Seiko caliber 7F32A parts catalogue and technical guide — a comprehensive workshop reference for servicing this popular quartz movement. Provides exact specifications: 24.0 mm outside diameter, 23.3 mm casing diameter, 2.9 mm height, step motor drive, and 3 jewels. Documents all functional complications including moon phase hand, date hand, instant lunar and instant calendar functions, along with train wheel setting device and electronic circuit reset switch. Step-by-step disassembly and reassembly procedures ensure accurate movement teardown and reconstruction. Lubrication guide details all oil types and precise quantities needed at each assembly point. Comprehensive parts diagrams assign identification numbers to every component for quick reference during repair. Battery specifications cover the SR916SW cell with approximately 3-year service life at 1.55V. Component descriptions explain function and correct positioning. Invaluable for watch technicians, horologists, and service centers needing accurate, detailed information for 7F32A movement maintenance and repair.
Seiko Cal. 7F38A, 7F39A, 7F68A, 7F69A Parts Catalogue and Technical Guide
Comprehensive parts catalogue and technical service guide for Seiko quartz watch movements Cal. 7F38A, 7F39A, 7F68A, and 7F69A. This workshop manual supplies watch technicians with detailed component specifications, exploded assembly diagrams for case, hands, dial, and movement subassemblies, and precise part numbering for every replaceable element. Includes movement schematics covering both 2-hand and 3-hand configurations, moon phase indicator technical data, and complete lubrication charts specifying oil application points and quantities. Battery specifications detail the SR916SW silver oxide cell (Maxell-compatible) with approximately 3-year service life at 1.55V nominal voltage. Calendar mechanism parameters, measurement tolerances, and assembly procedures enable comprehensive repair and maintenance work. An essential technical reference for professional watch repair.
Seiko Cal. 7G21A Parts Catalogue and Technical Guide
Seiko Cal. 7G21A parts catalogue and technical guide for this precision quartz stepping motor movement. Provides complete specifications including 2.2 mm height and 15.5 mm case diameter, with detailed coverage of the load-compensated stepping motor, LED illumination circuit, and electronic reset mechanism. Features exploded diagrams showing all movement components and their relationships. Covers battery requirements (1.55V for primary operation, 3.0V for bulb illumination), step-by-step disassembly and reassembly procedures with proper technique, lubrication specifications using Moebius A oil, SEIKO Watch Oil S-6, and silicone oil 500,000 c.s., and electrical testing parameters for coil block resistance and current consumption measurement. Essential reference for service technicians working on this caliber.
Seiko Cal. 7L22A Parts Catalogue and Technical Guide
Complete technical data and parts catalogue for the Seiko Cal. 7L22A kinetic chronograph movement. This workshop manual provides detailed specifications essential for service and repair, including precise movement dimensions (Ø32.0 mm, Ø30.0 mm casing, 6.4 mm height), 8 jewels, step motor drive system, chronograph stopwatch function with 45-minute capacity measurable in 1/5 second increments, instantaneous date calendar, energy depletion warning indicator, and the proprietary automatic power generating system with Titanium lithium ion rechargeable battery (KINETIC E.S.U). Operating voltage range 0.45–2.5V with monthly rate accuracy within 15 seconds. An indispensable parts list and technical reference for watchmakers and repair technicians maintaining Seiko kinetic chronographs.
Seiko Cal. 7L22A Service Manual - Lubrication and Reassembly
Seiko Cal. 7L22A Service Manual – Lubrication and Reassembly. This workshop manual extract covers the critical lubrication procedures and reassembly steps for the Seiko 7L22A quartz chronograph movement. The guide walks through lubricating the heart cams, minute and second counting wheels, and the train wheel bridge assembly with precise technical detail. Reassembly instructions specify exact positioning for counting wheel washers and heart cam alignment to ensure accurate chronograph function. Technical illustrations document lubrication points and step-by-step reassembly sequences essential for proper movement restoration. An indispensable repair resource for technicians servicing this caliber.
Seiko Cal. 7L22A Technical Guide
Technical guide for the Seiko caliber 7L22A quartz chronograph movement, designed for technicians performing service, repair, and maintenance work on this specific caliber. Details the internal circuit block structure and provides comprehensive disassembly and reassembly procedures essential for proper servicing. Covers the exclusive movement holder—its setup requirements, correct handling techniques, and step-by-step operational instructions vital for safe movement work. Includes precise procedures for installing both chronograph and hour hands, along with complete lubrication specifications detailing which oils to apply (Moebius A, Moebius F, and SEIKO Watch Oil S-6) and exact quantities for each component. Illustrated throughout with detailed technical drawings and photographs, making each repair procedure clear and straightforward. This workshop manual is indispensable for any watchmaker or technician working with the 7L22A movement.
Seiko Cal. 7M Series Parts Catalogue Technical Guide Supplement
Seiko Cal. 7M Series parts catalogue and technical service supplement covering the automatic generating system. Includes detailed troubleshooting reference with fault identification, root causes, and repair procedures for the self-winding mechanism. Features comprehensive repair notes on the generating system with step-by-step lubrication instructions and technical diagrams. Documents structural modifications and specifications for the intermediate wheel and generating rotor assemblies, making this an essential workshop manual for technicians servicing these movements.
Seiko Cal. 7M22A Movement Parts Catalogue and Technical Guide
Complete parts catalogue and technical workshop manual for the Seiko Cal. 7M22A automatic generating quartz movement. This service manual provides detailed specifications, exploded-view diagrams with numbered components for precise identification, and step-by-step disassembly and reassembly procedures for repair and overhaul work. Includes comprehensive lubrication instructions and technical adjustment protocols to restore movement performance. Covers movement architecture, circuit block component layout, coil resistance values for electrical diagnostics, current consumption measurements for power system verification, and automatic generating system testing and validation procedures. An essential reference for watchmakers and technicians servicing this specialized kinetic quartz caliber.
Seiko Cal. 7N00C, 7N01C, 7N21C Parts Catalogue and Technical Guide
Seiko Cal. 7N00C, 7N01C, and 7N21C parts catalogue and technical service guide for quartz watch movements. Covers detailed specifications, exploded component diagrams, referenced parts lists, hand height installation data, circuit block schematics, step-by-step disassembly and reassembly procedures, train wheel bridge adjustments, and diagnostic testing of coil block resistance and current draw parameters. Essential reference for technicians performing maintenance, repair, or restoration work on these popular Seiko quartz calibers.
Seiko Cal. 7N07A Parts Catalogue and Technical Guide
Comprehensive parts catalogue and technical service guide for the Seiko Cal. 7N07A quartz movement. This workshop manual provides the technical depth required for professional repair, maintenance, and accurate restoration work. Features a complete exploded view diagram with all movement components clearly identified, accompanied by a detailed parts list with factory reference numbers for ordering and component tracking. Includes essential assembly and disassembly procedures with step-by-step guidance for technicians. Hand installation height discrimination tables ensure precise positioning during dial and hand installation. The circuit block structure diagram and train wheel setting position charts enable accurate calibration and alignment. Electrical specifications detail coil resistance and current consumption values necessary for troubleshooting and quality control verification. An invaluable reference for watchmakers and repair specialists working with this movement.
Seiko Cal. 7N07C, 7N08C Parts Catalogue and Technical Guide
Complete parts catalogue and technical guide for Seiko Cal. 7N07C and Cal. 7N08C quartz movements. This service manual delivers the technical depth needed for professional watchmakers and experienced repair technicians working with these economical yet reliable movements. Detailed specifications are paired with exploded view diagrams showing every numbered component, making identification and sourcing straightforward. Step-by-step disassembly and reassembly procedures walk you through the complete process, while dedicated lubrication guidelines specify Moebius A oil application points for optimal performance and longevity. Movement dimensions and electrical specifications are fully documented. The guide covers all functional aspects of these 3-hand movements, including the step motor with load-compensated driving pulse type, train wheel setting device, and electronic circuit reset switch. Battery information details the SR621SW cell and compatible alternatives, all rated at 1.55V nominal voltage with an approximate 2-year service life. The battery life indicator function is explained to help diagnose battery condition during service. These zero-jewel movements carry no mechanical regulation system, simplifying maintenance while keeping the design cost-effective. An indispensable workshop reference for anyone servicing these Seiko calibers.
Seiko Cal. 7N22C and 7N29C Parts Catalogue and Technical Guide
Comprehensive parts catalogue and technical service guide for Seiko quartz movements Cal. 7N22C and Cal. 7N29C. This workshop manual covers all essential specifications, exploded diagrams, and detailed parts lists with factory reference numbers for accurate component identification and sourcing. Includes step-by-step assembly and disassembly procedures for technicians performing repairs and maintenance. Technical sections address circuit block structure, proper hand installation methods, date dial guard configuration, battery installation and replacement, train wheel bridge alignment and settings, and value checking procedures necessary for movement verification and regulation. Essential reference for watchmakers and service centers working with these Seiko calibers.
Seiko Cal. 7N32C, 7N33C, 7N39C Parts Catalogue and Technical Guide
Seiko Cal. 7N32C, 7N33C, 7N39C Parts Catalogue and Technical Guide Complete parts catalogue and technical service manual for Seiko quartz watch movements Cal. 7N32C, 7N33C, and 7N39C. This workshop reference covers full specifications for all three calibers, step-by-step disassembly and reassembly procedures, hand installation height discrimination methodology, comprehensive parts listing with exploded diagrams, circuit block architecture, and electrical verification data including coil block resistance measurements and current consumption values. Essential troubleshooting and maintenance reference for watch technicians and service centers working on these precision quartz movements.
Seiko Cal. 7N35C / 7N36C Parts Catalogue and Technical Guide
Seiko Cal. 7N35C and 7N36C quartz watch movement parts catalogue and technical service guide. This comprehensive workshop manual provides complete specifications for both caliber variants, a fully indexed parts list with numbered exploded diagrams for rapid component identification, and systematic disassembly and reassembly procedures. Coverage includes movement servicing, hand installation alignment, date dial guard removal and reinstallation, battery replacement, train wheel bridge positioning, and setting lever and yoke assembly configuration. Also included are electrical procedures for coil block resistance measurement and current consumption verification—essential checks for validating movement performance after repair. A practical reference for watch technicians performing routine maintenance or overhaul on these reliable quartz movements.
Seiko Cal. 7N42C & 7N43C Parts Catalogue and Technical Guide
Comprehensive parts catalogue and technical service guide for Seiko quartz watch movements Cal. 7N42C and Cal. 7N43C. This workshop manual delivers the detailed component information repair technicians and watchmakers need, including indexed part numbers for every assembly, exploded views showing correct orientation and relationships, step-by-step disassembly and reassembly procedures, and hand installation specifications for proper timekeeping alignment. Battery installation instructions cover correct polarity and seating to ensure reliable power delivery. Technical specifications detail movement dimensions, driving system operation, date calendar mechanism function, and critical electrical parameters including coil block resistance values and current consumption measurements for diagnostics and quality control. An essential reference for service centers working with these common quartz calibres.
Seiko Cal. 7S26A / 7S36A Parts Catalogue/Technical Guide
Technical parts catalogue and service guide for Seiko Cal. 7S26A and Cal. 7S36A automatic watch movements—the 21-jewel and 23-jewel versions respectively that power countless Seiko sports and dive watches. Supplies complete movement specifications including casing diameter (Ø27.4mm) and height (4.9mm), operating frequency (21,600 bph), and full technical rundown of the three-hand display, automatic winding system, quickset date and day calendar functions. The core strength of this manual lies in its detailed exploded-view parts diagrams with every component individually numbered and identified, making teardown and rebuild straightforward. Also covers lubrication schedules and approved oils (Moebius A, Seiko Watch Oils S-4 and S-6) essential for proper movement service and long-term accuracy. Invaluable for watchmakers, technicians, and serious enthusiasts performing maintenance, repair, or complete overhaul of these robust and widely-serviced calibres.
Seiko Cal. 7T32A Chronograph Parts Catalogue and Technical Guide
Complete parts catalogue and technical guide for the Seiko calibre 7T32A chronograph movement. This workshop manual covers detailed specifications and assembly procedures essential for service technicians and watchmakers working with this quartz chronograph calibre. The guide includes step-by-step disassembly and reassembly instructions, comprehensive parts diagrams with numbered components for easy identification, lubrication specifications and application points, battery installation procedures, and technical notes on proper parts fitment and alignment. Exploded views show both the movement layout and circuit block configuration, making this an indispensable reference for repair and maintenance work on 7T32A equipped timepieces.
Seiko Cal. 7T32B / 7T42B Parts Catalogue and Technical Guide
Seiko Cal. 7T32B and Cal. 7T42B quartz chronograph movements parts catalogue and technical service manual. Contains comprehensive specifications including movement dimensions, timekeeping functions, drive system architecture, supplementary mechanisms, accuracy tolerances, battery requirements, and jewel positioning. Illustrated parts diagrams with numbered components throughout support assembly, disassembly, and maintenance work. Includes lubrication guidelines essential for proper movement servicing and long-term reliability.
Seiko Cal. 7T39B Parts Catalogue and Technical Guide
Complete parts catalogue and technical service guide for the Seiko Cal. 7T39B quartz movement, essential reference material for watchmakers and service technicians. Provides comprehensive exploded views and numbered component diagrams for systematic disassembly and reassembly. Details lubrication specifications critical for proper movement function, along with battery particulars including the SR927W cell (1.55V, 2-year service life). The integrated step motor with electronic circuit reset function ensures reliable timekeeping. Covers the stopwatch mechanism with 1/5-second hand resolution, dual time display capability, and alarm function. Movement dimensions: 27.6mm outside diameter, 4.0mm height. Technical remarks address winding stem handling, day dial guard assembly, calendar correction wheel interaction, and circuit block configuration—information necessary for proper servicing without damage. Includes specifications and technical notes sections structured for workshop reference and repair planning.
Seiko Cal. 7T42A Parts Catalogue & Technical Guide
Seiko Cal. 7T42A parts catalogue and technical service guide for this quartz watch movement with integrated timer function. Provides complete specifications alongside detailed exploded diagrams identifying every numbered component—from the piezoelectric element and case back through buttons, hands, wheels, coils, rotors, stem, and circuit blocks. Includes step-by-step disassembly and reassembly procedures with lubrication specifications for proper maintenance. Contains value-checking data covering coil resistance, current consumption, and time accuracy verification. Parts are cross-referenced by part number with comprehensive combination charts distinguishing M and L movement variants, making this an essential reference for watch technicians and service professionals working on this model.
Seiko Cal. 7T52B & 7T59B Parts Catalogue & Technical Guide
Comprehensive parts catalogue and technical service guide for Seiko Cal. 7T52B and 7T59B quartz watch movements. This workshop manual delivers detailed exploded diagrams of all movement components with numbered part identification, essential for accurate assembly and disassembly work. Includes step-by-step procedures for movement maintenance, lubrication specifications at critical contact points, battery installation and replacement instructions for SR927W cells (1.55V), and stopwatch hand reset techniques. Technical reference data covers movement dimensions (27.6mm outside diameter, 3.2mm to 4.0mm height), stepper motor drive system operation, and handling notes for specialized components including dial holding rings, winding stems, and date wheel assemblies. An indispensable troubleshooting and repair resource for watchmakers and technicians servicing these durable quartz calibers.
Seiko Cal. 7T62A, 7T92A Parts Catalogue/Technical Guide
Complete parts catalogue and technical guide for Seiko Cal. 7T62A and Cal. 7T92A quartz chronograph movements. This service manual covers detailed movement specifications, precise dimensions (Ø27.6 mm, height 3.3 mm, case Ø27.0 mm), and comprehensive stopwatch function operation with measurement performance data. Includes alarm setting procedures, battery specifications (1.55V, approximately 3 years service life), and button operation sequences for standard measurement and split-time measurement modes. Features operating diagrams and functional schematics essential for understanding and servicing these calibers. An invaluable reference for technicians performing maintenance, repair, and adjustment work on these widely used quartz chronograph movements.
Seiko Cal. 7T62A/7T92A/7T94A Parts Catalogue and Technical Guide
Technical service manual and parts catalogue for Seiko quartz chronograph movements Cal. 7T62A, 7T92A, and 7T94A. This workshop guide covers movement specifications (diameter 27.6 mm, height 3.3 mm), comprehensive time indication and stopwatch functions with variable run times (60 minutes maximum for Cal. 7T62A and 7T94A; 12 hours maximum for Cal. 7T92A), and alarm capability specific to Cal. 7T62A. Includes battery data (1.55V nominal, 3–5 year typical service life) and detailed technical notes on feature operation and button programming—essential reference material for repair technicians performing overhaul, adjustment, and troubleshooting on these three movement calibers.
Seiko Cal. 8123A - Parts List and Technical Specifications
Technical reference documentation for the Seiko caliber 8123A quartz watch movement, essential for service technicians and repair specialists working on this compact caliber. Page 1 features detailed exploded views showing the complete movement assembly and individual component parts, each identified with precise part numbers for accurate ordering and replacement. Page 2 contains the full technical specifications: casing diameter 25.6 mm, maximum height 2.9 mm (without battery), 5 jewels, quartz crystal oscillator frequency of 32.768 Hz, 2-pole stepper motor, lever-based regulating switch system, and integrated instant-set mechanism for day and date calendar functions. The comprehensive parts list catalogs over 60 individually numbered components spanning wheels, pinions, hairsprings, levers, dial elements, battery types, and fasteners. Includes details on the bilingual calendar changeover system and battery life indicator feature. Indispensable as a workshop manual and repair reference for anyone servicing or maintaining this movement.
Seiko Cal. 8123A Quartz Watch Parts Catalogue
Comprehensive parts catalogue for the Seiko Cal. 8123A quartz movement. This detailed service manual features an illustrated exploded diagram identifying 30+ individual components with reference numbers, complete technical specifications, and an organized parts list cross-referencing each component by number and functional nomenclature. Coverage includes essential movement assemblies—train wheels, casing elements, dial components, circuit block, rotor-stator assembly, battery contacts, and fasteners—plus a dual calendar display for day and date. Battery compatibility confirmed for Seiko TR1120SW, Maxell SR1120SW, and U.C.C. 381 cells. Essential reference for watchmakers, technicians, and authorized service centers performing repairs, maintenance, or component replacement on Cal. 8123A-equipped timepieces.
Seiko Cal. 8222A Quartz Movement Parts List
Comprehensive parts list and exploded diagrams for the Seiko Cal. 8222A quartz watch movement. Documents the complete component inventory for this 4-jewel step motor system, featuring a 32.768 kHz quartz crystal oscillator, trimmer capacitor regulation, and calendar complication. Covers two distinct configuration variants for the center wheel and pinion, fourth wheel and pinion, and hour wheel assemblies in both silver and gold finishes. Includes technical specifications, positioning details for date dial markers and tube assemblies, and remarks essential for accurate movement assembly and servicing.
Seiko Cal. 8800A, 8800B Stopwatch Parts List
Comprehensive parts list and exploded view for the Seiko Cal. 8800A and 8800B stopwatch movements. This document provides detailed component identification and material specifications essential for repair, maintenance, and parts sourcing. Specifications include a casing diameter of 40.25 mm and maximum height of 7.55 mm, with vibration rates of 16,000 per hour for the 8800A and 36,000 per hour for the 8800B. The manual covers shock-resistant device construction, winding stem specifications across different case sizes, and balance cock washer thickness variants. Each component is systematically numbered and described, making this parts list indispensable for watchmakers performing service work on these reliable chronograph calibers.
Seiko Cal. 8M25A, 8M25B Parts Catalogue and Technical Guide
Seiko Cal. 8M25A, 8M25B Parts Catalogue and Technical Guide — comprehensive service documentation for these quartz step-motor movements. Provides detailed movement specifications including outside diameter Ø24.0mm, casing diameter Ø25.5mm, and 2.6mm height, alongside technical data on the fixed-width pulse stepping motor system, regulation via trimmer condenser, and 4-jewel construction. Exploded diagrams display all internal movement components and circuit block assembly with precise parts identification. Includes technical notes highlighting the specific differences between 8M25A and 8M25B calibers to aid accurate servicing and parts matching. Battery specifications cover SEIKO SR920W and Maxell SR920W cells at 1.55V with approximately 2.5 years estimated service life. Essential reference for watch repair technicians and movement specialists working on these common quartz calibers.
Seiko Cal. 8M35A Movement Parts Catalogue Technical Guide
Seiko Cal. 8M35A movement parts catalogue and technical service guide for quartz watch repair and maintenance. Provides complete specifications for this 24.0mm diameter, 2.6mm height movement with 2-hand display and mode indicator function. Features detailed exploded diagrams with numbered component identification, supported by step-by-step disassembly and reassembly procedures essential for professional servicing. Documents the stepper motor driving system, preset countdown timer options at 5, 10, and 15 minutes with user-adjustable settings up to 30 minutes, electronic circuit reset functionality, and hands zero-reset adjustment calibration. Battery compatibility covers SEIKO SR920W or Maxell SR920W cells (1.55V nominal, approximately 2.5 year service life). Includes lubrication specifications and technical performance data necessary for complete movement overhaul and troubleshooting. Indispensable workshop reference for watchmakers and technicians servicing this popular quartz module.
Seiko Cal. 8M37A Parts Catalogue and Technical Guide
Parts catalogue and technical guide for the Seiko Cal. 8M37A quartz watch movement. This service manual provides everything needed to understand, maintain, and repair this movement: detailed specifications, exploded diagrams with clearly numbered component references, step-by-step disassembly and reassembly procedures, mode indicator installation instructions, battery handling and replacement procedures, and technical data for checking performance parameters. Includes circuit block structure documentation with identification marks to distinguish between Cal. 8M Series variants. Covers lubrication specifications for critical components, stepper motor drive system operation, preset countdown timer functionality, and electronic circuit reset methods. An essential workshop reference for watchmakers and technicians servicing Seiko quartz movements.
Seiko Cal. 8S21A/8S23A Parts Catalogue and Technical Guide
Complete parts catalogue and technical guide for Seiko solar quartz watch movements Cal. 8S21A and Cal. 8S23A. This workshop manual features detailed exploded views with numbered components, technical specifications, and step-by-step disassembly and reassembly procedures essential for professional service work. Includes manufacturer remarks on critical parts such as the dial, hands, capacitor unit, train wheel bridge, and date mechanisms. The guide covers installation instructions, checking procedures for quick-start function and capacitor conductivity testing, lubrication guidelines for optimal movement performance, and a comprehensive troubleshooting chart for electronic circuit diagnosis. An invaluable reference for watch technicians and repair professionals working with these solar-powered movements.
Seiko Cal. 8V20A Parts Catalogue Technical Guide
Complete parts catalogue and technical service guide for the Seiko Cal. 8V20A quartz chronograph movement. This workshop manual covers repair, maintenance, and parts identification: full technical specifications, detailed movement diagrams (Ø29.1mm, height 3.3mm including battery), step-by-step disassembly and reassembly procedures with numbered component identification, and comprehensive parts listing. The movement features 3 hands with multi-function hand, step motor with fixed-width pulse system, 24-hour alarm, countdown timer (up to 30 minutes), stopwatch with 1/10 second increments (up to 30 minutes), hands zero-reset adjustment, and alarm test function. Specifications include trimmer condenser regulation, 0 jewels, monthly rate better than 20 seconds, and compatibility with SR1130W batteries (Seiko, Maxell, Sony) or Eveready 389—approximately 2 years service life at 1.55V. Essential reference for watchmakers and technicians performing preventive maintenance or troubleshooting on this reliable quartz chronograph caliber.
Seiko Cal. 8V22A Parts Catalogue and Technical Guide
Seiko Cal. 8V22A parts catalogue and technical guide — comprehensive service manual for this quartz movement. Specifications: 29.1mm diameter, 3.3mm height with battery; step motor with fixed-width pulse system; 24-hour indication, alarm, and world time functions. Complete parts list with numbered components and assembly/disassembly diagrams detailing each repair stage. Technical data includes coil block resistance values, current consumption specs, and battery information (SR1130W, 1.55V, ~2 years life expectancy). Circuit block structure breakdown and step-by-step disassembly and reassembly procedures with essential technical remarks for accurate restoration. Indispensable reference for watchmakers and technicians servicing or repairing this movement.
Seiko Cal. 8V36A Parts Catalogue and Technical Guide
Seiko Cal. 8V36A parts catalogue and technical service guide for the quartz alarm watch movement. Covers complete movement specifications including the 31.8mm diameter design, step motor mechanism, and ultrasonic alarm system. Provides exploded movement diagrams with all numbered components—battery contacts, wheel assemblies, hand mechanisms, alarm modules, and integrated circuit block—making component identification and sourcing straightforward. Detailed reassembly procedures walk through conductive plate installation, alarm wheel positioning and engagement, ultrasonic motor block setup with critical handling guidance, and circuit block structure interpretation. Essential reference for repair technicians and watchmakers performing maintenance, troubleshooting, or complete movement overhaul on this compact alarm movement.
Seiko Cal. 8Y21A Parts Catalogue and Technical Guide
Seiko Cal. 8Y21A step motor movement parts catalogue and technical service manual. This comprehensive workshop guide provides detailed specifications, disassembly and reassembly procedures for systematic maintenance and repair. Includes component identification with numbered parts references, circuit block architecture, and step-by-step valve checking procedures essential for proper functioning. Movement diagrams illustrate internal mechanisms, while lubrication specifications ensure correct servicing at each assembly stage. An indispensable reference for technicians working with this quartz movement.
Seiko Cal. 9T82A Movement Parts Catalogue & Technical Guide
Comprehensive parts catalogue and technical service guide for the Seiko Cal. 9T82A automatic kinetic movement. This workshop manual provides watchmakers and technicians with detailed disassembly and reassembly procedures, lubrication specifications, and complete movement dimensions. Includes technical specifications, step-by-step hands installation procedures, stopwatch mechanism adjustment guidance, and dial removal and installation instructions. Covers both conventional and one-piece case construction methods, with specific adhesive application protocols for case back and bezel screws using LOCTITE 241. Essential reference for service, maintenance, and repair of this kinetic automatic caliber.
Seiko Cal. A547A Digital Quartz Parts List
Comprehensive parts list for the Seiko Cal. A547A digital quartz watch movement, essential reference material for technicians, hobbyists, and repair professionals working on this caliber. The document provides detailed component identification with factory part numbers, enabling precise sourcing and replacement of individual elements. Includes exploded assembly views of the LCD panel configuration, battery specifications (Maxell SR726W, 1.55V silver oxide cell), and systematic breakdown of all movement assemblies. An invaluable resource for maintenance, restoration, or component-level repair on A547A equipped timepieces, formatted as a technical parts reference suitable for workshop use or archival documentation.
Seiko Cal. A714A Digital Quartz Watch - Parts Catalogue
Parts catalogue for the Seiko Cal. A714A digital quartz watch movement. This service documentation provides detailed component illustrations and parts numbering essential for identifying every element of the movement assembly. Exploded view diagrams show how each part fits within the movement, making this catalogue invaluable for technicians performing repairs, maintenance, or reassembly work on this caliber. Whether you're sourcing replacement components or verifying part compatibility, this technical reference delivers the precision documentation needed for accurate watchmaking service.
Seiko Cal. B122A Digital Quartz Parts List
Comprehensive parts list for the Seiko Cal. B122A digital quartz movement. This technical reference provides detailed component diagrams and complete part numbering for service technicians and watch repair specialists. Use this guide to identify replacement components, cross-reference assembly diagrams, and source genuine Seiko parts for Cal. B122A watches. Essential reference for workshop repair and maintenance of this digital quartz caliber.
Seiko Cal. C153A Digital Quartz Parts List
Seiko Cal. C153A digital quartz watch parts list with detailed numbered component diagrams and exploded views. Covers the complete movement assembly, LCD display module, case structure, and all mechanical components. Each part is cross-referenced with its factory part number for accurate ordering and identification during repair or service work. An essential reference for technicians and watchmakers performing maintenance, troubleshooting, or restoration on this classic digital quartz model.
Seiko Cal. C515A Digital Quartz Parts List
Comprehensive parts list and replacement components guide for the Seiko Cal. C515A digital quartz movement. Details individual components with factory reference numbers essential for watch service, repair, and maintenance work. Includes illustrative diagrams showing component placement and assembly relationships, making this reference invaluable for technicians performing calibration adjustments, battery replacement, and module rebuilds on this popular quartz movement.
Seiko Cal. E029A Digital Quartz Parts List
Seiko Cal. E029A digital quartz watch movement parts list with comprehensive component diagrams and part numbering for complete movement assembly. Details display module configuration, movement plates, gear trains, fasteners, and all mechanical and electrical subassemblies needed to service or rebuild this popular quartz caliber. Multiple assembly variations shown to accommodate different watch case and dial configurations. Essential reference for watchmakers and technicians performing maintenance, repair, or restoration work on E029A-equipped timepieces.
Seiko Cal. F221A Digital Quartz Parts List
Seiko Cal. F221A digital quartz watch parts list with exploded diagrams showing complete component assembly and identification. Provides part numbers and technical specifications for every module in this 12-hour LCD display movement, including the liquid crystal display panel, date and day-of-week calendar functions, and the trimmer capacitor regulation circuit that governs frequency accuracy. Essential reference for technicians performing maintenance, repair, or module replacement on this classic digital quartz caliber. Enables precise parts ordering and assembly verification during service work.
Seiko Cal. H021A Parts Catalogue and Technical Guide
Parts catalogue and technical guide for the Seiko Cal. H021A hybrid analog-digital watch movement. Provides detailed movement specifications (diameter 31.0mm, height 5.5mm, 5 jewels) alongside comprehensive disassembly and reassembly procedures illustrated with numbered component diagrams. Includes lubrication guidelines and systematic component identification throughout. The movement combines a step motor driving system with a multiplexed LCD digital display paired against a traditional 3-hand analog section (hour, minute, second hands). Digital functions cover time and calendar display, world time capability, stopwatch with 1-minute tachymeter scale, and hourly chime signal. An essential service manual and parts reference for technicians working on this integrated quartz hybrid platform.
Seiko Cal. M354A Digital Quartz Parts List
Comprehensive parts list for the Seiko Cal. M354A digital quartz movement, featuring detailed exploded diagrams of the watch case assembly, quartz module, and all internal mechanical and electronic components. Each part is cross-referenced with numbered designations, making this essential for technicians performing repairs, restoration, or complete disassembly and reassembly of this digital quartz caliber. The technical breakdown covers the full range of movement elements, allowing precise component identification and sourcing for service work on M354A-equipped watches.
Seiko Cal. M421A Digital Quartz Watch Parts Catalogue
Seiko Cal. M421A Digital Quartz Watch Parts Catalogue — a comprehensive parts list with reference numbers and detailed component photographs. This resource is essential for technicians and watchmakers servicing or restoring M421A models, providing the complete breakdown needed to identify, source, and order genuine replacement parts with confidence.
Seiko Cal. M422A Parts Catalogue and Technical Guide
Complete technical reference and parts catalogue for the Seiko Cal. M422A quartz watch movement, essential for technicians servicing or repairing this digital LCD timepiece. Provides full specifications including case diameter of 26.0 mm and movement height of 5.7 mm, along with detailed information on the nematic liquid crystal display architecture and multiplex driving circuitry. Documents all operational functions: 12 or 24-hour time display, calendar, alarm with test function, stopwatch, timer, dual time zone capability, hourly chime signal, and illumination feature with automatic calendar rollover. Covers the complete regulation system employing a trimmer condenser for frequency adjustment, lubrication requirements specifying silicone oil at 500,000 centistokes, and battery specifications for the Seiko CR2025 cell rated at 3.0 volts with an approximate 10-year service life. Includes comprehensive exploded parts diagram with numbered component identification for accurate assembly, disassembly, and parts sourcing. Invaluable workshop resource for watch repair professionals and movement technicians.
Seiko Cal. M726A Module Parts Catalogue and Technical Guide
Complete parts catalogue and technical service guide for the Seiko Cal. M726A module, essential for anyone servicing or repairing Seiko dive watches fitted with this movement. Provides a fully numbered parts breakdown with detailed disassembly and reassembly procedures, allowing technicians to correctly identify every component and perform maintenance work with confidence. Module specifications: 30.0 mm diameter, 6.48 mm height. Covers all key functional elements including the sensor fixing plate, pressure sensor unit, gaskets, and liquid crystal display featuring nematic FEM technology with 1/4 multiplex driving system. The display supports 12 or 24-hour time and calendar modes, alarm display, dedicated dive mode display, integrated dive table, and log data display for recording dive information. Battery specifications: compatible with SEIKO CR2025, Maxell CR2025, or Matsushita CR2025 cells (3.0V nominal, approximately 3-year service life under normal conditions). Monthly rate accuracy: less than 15 seconds at normal operating temperature range. Indispensable workshop manual for authorized dealers and independent repair technicians working with this module.
Seiko Cal. N944A, N945A Parts Catalogue & Technical Guide
Seiko Cal. N944A, N945A Parts Catalogue & Technical Guide Parts catalogue and workshop manual for Seiko quartz movements Cal. N944A and N945A. This service guide provides detailed specifications, exploded diagrams of all movement components, and a comprehensive parts list with numbered references for precise identification. Covers complete disassembly and reassembly procedures, step-by-step installation instructions for hands and wheel components, mode corrector wheel positioning techniques, battery installation protocols, resistance measurements for coil blocks, and current consumption data. Essential reference for watchmakers and technicians servicing these movements.
Seiko Cal. S021A Digital Quartz Stopwatch Parts List
Comprehensive parts list for the Seiko Cal. S021A digital quartz stopwatch, essential for technicians performing repairs, maintenance, or component replacement. Provides detailed part numbers and identification for all major assemblies including LCD display modules, printed circuit boards, motion components, gaskets, springs, fasteners, battery unit, and crystal oscillator. This repair manual enables accurate sourcing of genuine Seiko components and ensures proper reassembly of the movement mechanism.
Seiko Cal. S026A Parts Catalogue and Technical Guide
Complete parts catalogue and technical guide for the Seiko Cal. S026A digital module, essential for watch technicians and repair specialists working with this quartz movement. Provides detailed specifications for the 40mm outside diameter case, 23.6mm inner diameter, and 4.6mm height, along with comprehensive documentation of the nematic liquid crystal FEM display and its multiplex driving architecture. Covers all functional aspects including stopwatch display, integrated time and calendar features, and the automatic calendar mechanism that maintains accurate date advancement. The service manual includes fully annotated parts diagrams and exploded views of the complete case assembly, clearly identifying the case back, gaskets, battery compartment, crystal unit cushion, connector configuration, and liquid crystal panel layout. Step-by-step disassembly and reassembly sequences ensure proper handling during maintenance and repair work. Battery specifications detail compatible options: SEIKO SR41W, Maxell SR41W, SONY SR41W, or EVEREADY 392 cells rated at 1.55V with approximately 2.5 year operational life under normal conditions. Lubrication requirements are precisely specified, calling for silicone oil 500,000 cs for critical bearing surfaces and SEIKO Watch Oil S-6 for escapement and gear trains. An indispensable workshop resource for anyone servicing this popular digital quartz caliber.
Seiko Cal. S032A Stopwatch Parts Catalogue and Technical Guide
Complete parts catalogue and technical guide for the Seiko caliber S032A digital stopwatch. This service manual covers detailed specifications, step-by-step disassembly and reassembly procedures illustrated with numbered component diagrams, circuit block architecture, battery installation instructions, and practical service notes. The guide documents the liquid crystal display functionality including stopwatch mode, lap time recording, split time measurement, dual countdown timer, and calendar features. Essential reference for technicians performing maintenance, repair, or restoration work on this model.
Seiko Cal. S039A Parts Catalogue
Complete parts catalogue for the Seiko Cal. S039A stopwatch, serving as an essential service reference for technicians and experienced users performing maintenance, repair, or restoration work. Details all component specifications including the 47.4mm case diameter, Nematic Liquid Crystal display architecture with FEM driving system, and systematic disassembly and reassembly procedures supported by exploded views for each section. Provides exact part numbers across all assemblies: case back fasteners, circuit blocks, switching mechanisms, spring elements, connector interfaces, liquid crystal display panel, battery contact assemblies, and associated mechanical components. Specifies CR2032 3.0V battery type with approximately 3 years operational life under normal use. The methodical layout and technical illustrations make it straightforward to locate replacement parts, understand assembly sequences, and perform targeted repairs without unnecessary disassembly of unrelated sections.
Seiko Cal. S1 Series Digital Quartz Parts List
Seiko Cal. S1 Series Digital Quartz Parts List — comprehensive parts catalogue covering models S101A, S111A, S119A, and SP11. This service reference includes detailed parts lists organized by assembly with accurate part numbers for every component, from LCD modules and circuit boards to case components, battery contacts, and fasteners. Exploded views clarify the spatial arrangement and assembly sequence of each subassembly, making it essential for technicians performing repairs, replacements, or complete teardowns. Whether you need to source a specific resistor, identify a connector variant, or understand the complete bill of materials for warranty or service documentation, this parts list provides the precision data required. An invaluable resource for watch repair professionals and service centers working with Seiko's early digital quartz platform.
Seiko Cal. S140A, S143A Parts Catalogue & Technical Guide
Seiko Cal. S140A and S143A parts catalogue and technical service guide covering complete specifications for these quartz watch modules. Includes detailed disassembly and reassembly procedures, lubrication protocols for movement components, circuit block diagrams for troubleshooting and diagnostics, battery specifications and compatibility information, and comprehensive component documentation. An essential repair manual reference for technicians servicing these caliber movements.
Seiko Cal. S140A, S143A Stopwatch Parts Catalogue and Technical Guide
Seiko Cal. S140A, S143A Stopwatch Parts Catalogue and Technical Guide — comprehensive service and repair resource for these precision quartz stopwatch models. Features detailed parts identification with seventeen exploded diagrams showing component layout and assembly sequences. Both S140A and S143A models are covered with full specifications: liquid crystal FEM display technology, 1/4 multiplex driving system, up to 300 measurement memory capacity, stopwatch function capable of displaying up to 10 hours continuous timing, and integrated time and calendar display. The S143A variant includes printout capability for recorded data. Complete component listings with part numbers, technical performance data, and reference materials essential for service technicians performing maintenance, adjustment, and repair work on these stopwatch models. Ideal for workshop reference and parts ordering.
Seiko Cal. S149A Stopwatch Parts Catalogue and Technical Guide
Parts catalogue and technical guide for the Seiko Cal. S149A digital stopwatch module with integrated thermal printer. Includes detailed specifications, module dimensions (198.1mm × 81.6mm, height 28.5mm), display specifications (nematic liquid crystal, FEM), and mechanical components. Features disassembly and reassembly procedure references with exploded diagrams showing battery hatches, battery leads, and major module sections.
Seiko Cal. S234A Digital Quartz - Parts List
Comprehensive parts list for the Seiko Cal. S234A digital quartz watch movement. This workshop manual provides detailed component identification with factory part numbers covering the complete movement assembly, circuit blocks, liquid crystal display panel, CR2016 lithium battery system, case components, and individual fasteners and hardware. Essential reference for repair technicians, watchmakers, and service professionals performing maintenance, troubleshooting, or component replacement on S234A movements. Includes all part designations necessary for accurate ordering and assembly work.
Seiko Cal. S321A Digital Quartz Parts Catalogue
Complete parts catalogue for the Seiko Cal. S321A digital quartz movement, providing technicians and watchmakers with detailed component identification numbers and precision layout diagrams essential for accurate service and repair work. This reference maps every part of the movement assembly, making it indispensable for ordering replacements, troubleshooting, and executing repairs on this widely used quartz caliber. The systematic parts breakdown and visual schematics ensure you source the correct components and understand their relationship within the movement.
Seiko Cal. S600A Parts Catalogue and Technical Guide
Seiko Cal. S600A digital stopwatch module parts catalogue and technical repair guide. Covers detailed specifications and exploded-view diagrams of every component—case back, battery, circuit block, liquid crystal display panel, connectors, switch spring, and reflecting mirror—with step-by-step assembly and disassembly procedures illustrated throughout. Technical notes explain circuit block architecture, segment-electrode relationships, proper battery installation, and electrical value verification (current draw under 1.5µA). Module dimensions: 28mm diameter, 4.3mm height. Accepts SR927W batteries. Comprehensive reference for technicians performing maintenance, troubleshooting, or component replacement on this classic Seiko movement.
Seiko Cal. S610A Parts Catalogue and Technical Guide
Seiko Cal. S610A Parts Catalogue and Technical Guide — a comprehensive service and repair resource for this digital watch module. Covers full specifications, step-by-step disassembly and reassembly procedures, and a detailed module structure diagram to help technicians understand the internal layout. Includes battery installation instructions with proper orientation guidelines and value checking procedures to verify module function after service. The parts list provides numbered component identification covering the case back, module body, battery, contact switches, and display panel assembly. Technical remarks explain circuit block structure and current consumption behavior, essential information for diagnosing power-related issues and ensuring correct module performance. Whether you're performing routine maintenance or troubleshooting a malfunctioning unit, this workshop manual serves as the definitive reference for working with the Cal. S610A movement.
Seiko Cal. V051A Parts Catalogue and Technical Guide
Seiko Cal. V051A quartz movement parts catalogue and technical reference manual for watch service professionals and enthusiasts. Provides detailed specifications, movement schematics, and component identification with numbered reference diagrams essential for accurate repair work. Includes step-by-step disassembly and reassembly procedures, battery installation guidance, and technical notes covering critical elements such as hands, winding stem, battery contacts, switch spring, circuit block assembly, and train wheel bridge geometry. Features comprehensive exploded views and setting position diagrams that clarify component relationships during maintenance operations. An indispensable workshop manual for anyone servicing this specific quartz calibre.
Seiko Cal. V071A, V072A Service Guide
Technical service manual for Seiko Cal. V071A and V072A hybrid analog-digital watch movements. This repair guide provides complete specifications and movement dimensions for both calibers, covering dual time indication systems that combine a 3-hand analog display driven by stepper motor with a nematic liquid crystal digital display. Includes battery specifications (SR927W, 1.55V, 3-year service life), accuracy data, current consumption measurements, and a comprehensive parts reference with movement numbers and corresponding panel color options. Detailed hand installation procedures cover proper use of the specialized movement holder for accurate assembly. Essential workshop manual for technicians servicing these hybrid quartz movements.
Seiko Cal. V091A Service Guide
Seiko Cal. V091A service manual covering this distinctive hybrid analog-digital movement. The design combines a traditional 3-hand analog display with a Nematic Liquid Crystal digital readout using FEM (Field Effect Mode) technology, suitable for technicians servicing dual-display watches from the period. Movement dimensions measure 38.8 × 22.6 × 6.2 mm; the stepping motor powers the analog train while multiplex drive manages the digital segment. Power comes from two SR1120W batteries (SEIKO, SONY, or MAXELL branded; alternatively EVEREADY 391 cells) rated for approximately 2 years at 1.55V per cell. Current draw stays below 5.4 µA, and monthly rate accuracy is within 20 seconds. The guide addresses hand-height installation with three distinct options—short, standard, and extra height (reference UV09142)—critical for proper analog-display alignment without jewel complications. Whole-movement replacement policy governs service scope. Essential troubleshooting and repair reference for watch service centers and experienced restorers working with this Seiko caliber.
Seiko Cal. V110A Movement Parts Catalogue and Technical Guide
Seiko calibre V110A solar-powered quartz movement parts catalogue and technical repair guide. Covers the complete 15.55 mm diameter, 2.09 mm height movement with step motor drive system, load-compensated pulse control, electronic circuit reset switch, and overcharge prevention circuitry. Features detailed exploded component diagrams with numbered parts identification for the solar cell unit, solar cell lead terminal, dial washer, hour wheel, movement core, and case ring assembly. Includes step-by-step disassembly and reassembly procedures essential for service technicians, along with precise lubrication specifications for Moebius A and F oils to ensure optimal performance and longevity. A must-have workshop manual for anyone servicing Seiko solar movements.
Seiko Cal. V145A Solar Watch Parts Catalogue/Technical Guide
Comprehensive parts catalogue and technical service guide for the Seiko Cal. V145A solar watch movement. This workshop manual provides detailed specifications and exploded parts diagrams with numbered components for complete disassembly and reassembly of the movement. Covers solar cell unit installation including the holding ring assembly, date dial selection and precise positioning, battery unit specifications and handling procedures, winding stem removal techniques, and train wheel bridge assembly. Includes the complete movement schematic for reference and troubleshooting. Features practical charging time guidelines for various light sources, voltage range specifications essential for proper operation, and step-by-step guidance on solar cell and battery maintenance. An indispensable technical reference for watchmakers and technicians working with Seiko solar movements.
Seiko Cal. V14JA 25.0mm Parts Catalogue and Technical Guide
Complete parts catalogue and technical guide for the Seiko Cal. V14JA 25.0mm solar-powered quartz watch movement. This workshop manual delivers detailed component listings with part numbers and exploded diagrams covering the dial, hands, day-and-date calendar mechanism, train wheel bridge, rechargeable battery unit, and solar cell array. The repair and maintenance sections walk through disassembly and reassembly procedures, hand installation and dial positioning, calendar mechanism setup and adjustment, battery replacement and output voltage measurement, as well as charging protocols and current consumption testing. The movement features step motor drive technology, 3-hand time display with integrated day and date functions, a titanium-lithium rechargeable battery platform operating at 0.45–2.20V, and 2 jewels. An essential reference for service technicians and horologists working with this solar quartz caliber.
Seiko Cal. V339A Parts Catalogue and Technical Guide
Comprehensive parts catalogue and technical service guide for the Seiko Cal. V339A quartz watch movement. This workshop manual covers full specifications and detailed exploded diagrams of all internal components, with step-by-step disassembly and reassembly procedures essential for accurate repair work. Includes identification of all lubrication points, value checking parameters such as coil block resistance and current consumption measurements, plus practical guidance on date dial variations and proper winding stem selection. An indispensable reference for watch technicians and repair professionals working with this movement.
Seiko Cal. V656A Chronograph Parts Catalogue and Technical Guide
Comprehensive parts catalogue and technical guide for the Seiko Cal. V656A quartz chronograph movement. This workshop manual provides detailed exploded views with numbered components, exact specifications (outside diameter 29.5mm, casing diameter 28.8mm, height 3.1mm), step-by-step disassembly and reassembly procedures for hands and dial assembly, and battery installation and removal instructions. The technical reference includes a wheel distinction chart for accurate component identification, coil block resistance data, measuring procedures for chronograph accuracy, and current consumption values essential for diagnostics and repair work. Ideal for watchmakers, repair technicians, and technical service departments working on V656A chronograph movements.
Seiko Cal. V693A Parts Catalogue and Technical Guide
Complete parts catalogue and technical service guide for the Seiko Cal. V693A quartz movement. This workshop manual covers the full V693A platform with detailed component breakdown and numbered parts diagrams. Specifications include 24.0mm case diameter and 2.6mm height; the movement architecture is built around a step motor drive system optimized for reliable timekeeping. Covers all assembly and disassembly procedures essential for repair and rebuilding work. Includes mode indicator installation and removal instructions, circuit block structure reference, and step-by-step battery replacement procedures. Technical section provides coil block resistance values, current consumption data, and time accuracy specifications alongside practical notes on component handling and calibration adjustments. Indispensable reference for V693A maintenance and repair work.
Seiko Cal. V700C/V701C/V721C Service Guide
Service manual for Seiko quartz watch movements Cal. V700C, V701C and V721C. This technical guide provides detailed specifications for these movements, including a hand installation height discrimination table with dial numeral reference points to ensure correct hand positioning. Features circuit block structure diagrams mapping the internal architecture of the movement, along with comprehensive value checking parameters for coil resistance and current consumption measurements. An essential workshop reference for servicing or repairing these Seiko quartz calibers.
Seiko Cal. V782A/V783A/V789A Service Guide
Service guide for Seiko quartz watch movements Cal. V782A, V783A, and V789A. This technical manual covers complete movement specifications, dimensional data, hand height discrimination tables, circuit block structure diagrams, and comprehensive testing parameters for coil block resistance and current consumption verification. Essential reference for watch technicians performing diagnosis and calibration of these three-caliber series.
Seiko Cal. V785A Service Guide
Seiko Cal. V785A service manual covering complete technical specifications and repair procedures for this 17.8mm quartz movement. The guide details the three-hand display mechanism, step motor with load-compensated driving pulse technology, and the date calendar with instant-set capability. The hand installation height discrimination table distinguishes standard and extra-long hand types—essential for correct reassembly. Circuit block structure diagram (Part No. 4000-813) provides coil resistance specifications (2.4kΩ–2.8kΩ) and current consumption data for electrical diagnostics. Battery compatibility covers SEIKO SR621SW, SEAGEL SR821SW, SONY SR621SW, MATSUSHITA SR821SW, and EVEREADY 364 cells. Movement rated at less than 20 seconds monthly deviation under normal temperature conditions. Features electronic circuit reset switch and battery life indicator function. Ideal reference for technicians servicing or troubleshooting Cal. V785A equipped watches.
Seiko Cal. V827A Service Guide
Seiko Cal. V827A service manual for quartz watch movements. This workshop guide delivers the technical specifications and repair procedures needed for servicing this compact movement—featuring an 18.5mm diameter case with 16.8mm movement diameter, 3.6mm height, three-hand configuration, and load-compensated step motor design. The manual covers winding stem installation and hand positioning with precision alignment notes for the hour wheel ring, earth lead terminal connections, and current consumption verification. Includes detailed movement diagrams, electronic circuit reset procedures, instant date setting mechanism operation, and the complete technical data required for accurate service and adjustment. An essential reference for technicians working with this Seiko quartz caliber.
Seiko Cal. W810A Parts Catalogue and Technical Guide
Seiko Cal. W810A parts catalogue and technical service guide for this digital watch module. Covers complete disassembly and reassembly procedures with exploded component views, detailed parts list, and specifications for the nematic liquid crystal display with multiplex driving architecture. Includes timer and stopwatch function operation, memory recall features, lubrication instructions, battery installation notes, circuit block structure diagrams, and value checking methods for verifying time accuracy and current consumption. An essential workshop manual for technicians servicing this module.
Seiko Cal. Y102A and Y112A Parts List
Comprehensive parts list for Seiko caliber Y102A and Y112A quartz movements. This reference catalogs all mechanical and electromechanical components necessary for repair and restoration—train wheel bridge, center wheel, pinions, minute wheel, hour wheel, setting wheel, clutch wheel, winding stem, setting lever, yoke, date dial components, driving wheel, dial guard, circuit block, coil block, step rotor, rotor stator, battery connections, screws, and setting lever pin. The documentation covers two distinct dial variations that accommodate crown and calendar frame positioning at both 3 o'clock and 6 o'clock locations, with black numerals on white background options. Essential for watchmakers, service technicians, and movement specialists who require precise component identification and assembly guidance during disassembly, maintenance, or parts procurement.
Seiko Cal. Y151A Service Manual
Seiko Cal. Y151A quartz watch movement service manual with complete technical specifications and repair procedures. Covers movement dimensions (Ø 13.5 mm outside, 13.0 mm casing, 2.3 mm height), three-hand display configuration, and step motor with load compensation system. Includes train wheel setting device documentation, electronic circuit reset switch operation, and battery life indicator details for SEIKO/MAXELL SR4215SW 1.55V cells (approximately 2-year service life). Features hand installation discrimination table to ensure correct hand placement during reassembly. Step-by-step disassembly and reassembly instructions with detailed dial and hand removal procedures guide technicians through safe component separation and proper restoration. Electrical value checking data covers coil resistance specifications (3.4–4.1 kΩ) and current consumption measurements for circuit troubleshooting. Zero jewels movement ideal for comprehensive repair and maintenance reference.
Seiko Cal. Y187B Chronograph Parts Catalogue and Technical Guide
Complete parts catalogue and technical guide for the Seiko caliber Y187B chronograph movement. This service manual provides detailed specifications and component diagrams with part numbers for accurate ordering and identification. It covers full disassembly and reassembly procedures with lubrication points clearly marked, battery information, and functional checking procedures to verify operation after service. Also included are circuit block structure diagrams, dial variations, and technical remarks on wheel combinations and winding stem specifications. An essential workshop reference for repair technicians and horologists working on this quartz chronograph caliber.
Seiko Cal. Y301A and Y302A Parts Catalogue and Technical Guide
Complete parts catalogue and technical guide for Seiko Cal. Y301A and Y302A quartz watch movements. This service manual covers everything needed for workshop-level maintenance and repair, including detailed exploded views with systematic part numbering for quick component identification. Disassembly and reassembly procedures walk you through safe handling and precise reinstallation, while dedicated lubrication specifications ensure proper operation of all bearing surfaces and escapement components. Electronic circuit reset switch information helps diagnose and resolve timing issues. Technical data for both calibers include movement diameters (Ø20.0 mm for Y301A, Ø23.0 mm for Y302A), height, battery specification (1.55V), three-jewel bearing arrangement, and complete time indication system details. An essential reference for watch repair technicians, horologists, and serious hobbyists working with these common Seiko quartz movements.
Seiko Cal. Y481F Technical Data Sheet
Technical data sheet for the Seiko caliber Y481F quartz movement, providing comprehensive specifications for service technicians and watchmakers. Details the movement architecture with main plate dimensions of 18.4 mm spanning 6H to 12H positions and 15.3 mm across 3H to 9H, housed in a 17.8 mm diameter case at 2.8 mm total height. The movement features a three-hand time display driven by a step motor with load-compensative pulse system technology, ensuring reliable timekeeping under varying winding conditions. Incorporates a secondary setting device for precise seconds adjustment and an electronic reset switch for quick reference-time correction. Chronometric performance is specified at less than 20 seconds monthly deviation across the normal temperature operating range when measured using a 10-second gate quartz tester—a standard benchmark for production quality control. Battery compatibility covers SEIKO SR6215W, MAXELL SR6218W, SONY SR6215W, and EVERADY 364 cells (1.55V nominal, approximately 2 years service life under typical wear conditions). Current draw remains exceptionally low at less than 1.2 µA, extending battery longevity and reducing replacement intervals. This repair manual data sheet is essential for anyone servicing or reconditioning Y481F-equipped timepieces.
Seiko Cal. Y513A Analogue Quartz Service Manual
Service manual for the Seiko Cal. Y513A analogue quartz wristwatch. Provides complete technical specifications for the Y513A calibre, including the 2-jewel movement, 37.768 Hz crystal oscillator, 2-pole stop motor system, rotary step-switch regulation mechanism, and 1.55V silver oxide battery requirements. Covers time and calendar setting with detailed crown positioning instructions, dual-language calendar day and date adjustment via the bilingual change mechanism, operational theory of both the electronic circuit block and mechanical train, and precise time accuracy calibration procedures. Includes step-by-step disassembly and reassembly sequences for the calendar mechanism and circuit block assembly with complete lubrication guidance, cleaning protocols, and comprehensive checking and adjustment procedures to restore the movement to specification. This workshop manual serves as the authoritative repair guide for service technicians working on this popular Seiko quartz calibre.
Seiko Cal. Y911A Parts Catalogue and Technical Guide
Seiko Cal. Y911A parts catalogue and technical guide—a comprehensive service manual for this digital watch movement. Includes detailed exploded diagrams of all movement components, step-by-step assembly and disassembly procedures, and battery installation guidance. Covers liquid crystal display unit setup, train wheel bridge calibration, and circuit block resistance specifications. Technical data encompasses the movement's core functions: liquid crystal display, 3-hand timekeeping, stepper motor drive system, calendar display, alarm operation, and stopwatch function. Features resistance measurements, current consumption charts, and troubleshooting protocols for display segments and circuit diagnostics. Essential reference for technicians performing repair and maintenance work on this Seiko movement.
Seiko Cal. YT63A Movement - Technical Data
Complete technical data and service specifications for the Seiko Cal. YT63A quartz movement, an automatic generating system in 12" format. This repair and reference manual details the movement's core architecture: 27.0mm diameter, 4.89mm height, with three hands and day/date display. The movement employs a 32.768 Hz tuning fork quartz oscillator regulated by 6 jewels, paired with a titanium-lithium-ion power cell (9.5 × 2.05mm, 4.5mAh at 1.5V) and integral kinetic energy harvesting system. The document provides essential dimensions, time standard performance criteria, functional indicators, power supply characteristics, exploded parts breakdown with individual component codes, and step-by-step accuracy calibration procedures. Invaluable for horologists, technicians, and watchmakers performing maintenance, diagnostics, or module-level repair on YT63A movements.
Seiko Cal.2A54A Parts Catalogue
Parts catalogue and exploded view diagram for the Seiko Cal.2A54A (2j) quartz movement. This workshop manual provides detailed component identification with part numbers for every element—from the moon phase indicator unit and date mechanism to wheels, pinions, springs, and screws. Exploded assembly diagrams show the correct positioning and orientation of each part, making it essential for watchmakers performing disassembly, repair, maintenance, or restoration work on this movement. Reference guide for service technicians and independent repair professionals.
Seiko Cal.2B21A Parts Catalogue
Seiko Cal.2B21A watch movement parts catalogue with comprehensive exploded diagrams and part-number references. This service manual provides detailed illustrations of the complete movement assembly, breaking down every component from the hour, minute and second hands to the dial, gear train wheels and pinions, battery contacts and connections. Technical specifications are included for screws, jewel bearings, bridges, rotors and all associated mechanical elements. An essential reference for watch repair technicians and service centres performing maintenance, restoration or component replacement on this calibre.
Seiko Cal.2D22A Parts Catalogue
Comprehensive parts catalogue for the Seiko Cal.2D22A quartz movement, essential reference for watchmakers and technicians servicing this caliber. Features detailed exploded diagrams showing the complete movement architecture, including dial assembly, hands set, winding stem, clutch wheel, hour wheel, date mechanism components, and rotor-stator assembly. Identifies compatible battery types across multiple manufacturers — SEIKO TR621SW, Maxell SR621SW, UCC 364, and Sony Eveready 364 — ensuring correct power source selection for repair and maintenance. Supplies precise screw specifications and torque requirements for accurate reassembly. Each internal component is cross-referenced with official part numbers and technical drawings, allowing rapid identification and sourcing during workshop service procedures. Indispensable for anyone performing movement overhaul, regulation, or component replacement on this popular quartz caliber.
Seiko Cal.2D22A Quartz Movement Parts Catalogue
Parts catalogue for the Seiko Cal.2D22A quartz movement—essential reference for watchmakers and technicians servicing this widely-used caliber. Features a detailed exploded diagram with complete component identification and official part numbers covering the dial assembly, date guard, winding stem holder, calendar mechanism, and full internal movement layout with all major components clearly labeled. Includes battery specifications: SEIKO TR621SW, Maxell SR621SW, U.C.C. 364, and Sony Eveready 364. Invaluable for parts ordering, assembly verification, and repair documentation.
Seiko Cal.41A Quartz Movement Parts List
Parts list and technical specification sheet for the Seiko Cal.41A quartz watch movement, a compact 3-jewel mechanism measuring 19.4mm in diameter with a maximum height of 3.8mm and operating frequency of 32.768 Hz. This workshop manual features detailed parts illustrations with reference numbers, assembly diagrams showing component identification and positioning, and a complete parts nomenclature covering wheel bridges, pinions, rotors, hairsprings, screws, and jewels. Essential reference material for service technicians, watchmakers, and repair professionals working on Cal.41A movements or similar Seiko quartz mechanisms.
Seiko Cal.5Y01A & 5Y02A Parts Catalogue
Seiko Cal.5Y01A & 5Y02A Parts Catalogue — technical reference for these two quartz movements. Features technical diagrams with component identification and corresponding part numbers. Detailed schematics cover dial guards, gear trains, hour wheels, and date driving wheels with precise callouts. An essential document for technicians and watchmakers servicing Seiko quartz watches fitted with these movements.
Seiko Cal.7D48A Parts List (Page Extract)
Seiko Cal.7D48A movement parts list with exploded view diagram and component identification. This parts reference guide correlates numbered components with their corresponding part numbers across the calendar mechanism, intermediate wheels, circuit blocks, and associated assemblies. Essential for technicians performing maintenance, repair, or restoration work on Seiko 7D48A quartz movements. Provides the detailed breakdown required for accurate parts ordering and assembly verification during service operations.
Seiko Caliber 11A Movement Parts List and Technical Specifications (17j and 21j)
Technical reference documentation for the Seiko caliber 11A movement, covering both 17-jewel and 21-jewel variants. This service manual presents a complete parts list with numbered component references and detailed exploded views of all mechanical assemblies, including the barrel bridge, train-wheel bridge, pallet cock, balance cock, cannon pinion, hour and minute wheels, and ratchet wheel. The movement is housed in a 15.15 × 13.00 mm case with a maximum height of 3.50 mm and operates at 21,600 vibrations per hour. Both versions feature manual wind and Diashock shock resistance; the 21-jewel variant includes an integrated oil lubrication system. Essential for technicians performing movement repair, parts identification, and assembly work on this manual-wind caliber.
Seiko Caliber 11A Parts List - Technical Data and Component Specifications
Comprehensive parts list and technical documentation for the Seiko caliber 11A manual-wind movement, covering both 17-jewel and 21-jewel variants. This service manual details movement specifications including casing dimensions of 15.15 × 13.00 mm, maximum height 3.50 mm, and operating frequency of 21,600 vibrations per hour. Documentation covers the complete mechanical assembly: barrel bridge, train-wheel bridge, pallet cock, balance cock, escape wheel, pallet fork, and all internal components with corresponding part numbers. Includes practical technical remarks on critical tolerances such as cannon pinion lengths, hour wheel axle dimensions, and winding stem configurations. The movement features Seiko's Diashock shock-resistant device and Diafix oil lubrication system for reliable performance. Derived from the parent caliber 1104A platform. Essential reference for watchmakers performing disassembly, repair, maintenance, or parts identification work on caliber 11A timepieces.
Seiko Caliber 1520A Technical Data and Parts List
Seiko caliber 1520A technical data sheet and parts list for this 17-jewel mechanical watch movement. Covers complete specifications including casing dimensions of 19.80 x 9.60 mm, maximum height of 3.50 mm, and operating frequency of 19,800 vibrations per hour. Detailed parts inventory with individual part numbers for barrel assembly, gear train wheels and pinions, jeweled pallet fork, balance wheel assembly, escapement components, and fastening screws. Non-automatic movement equipped with Seiko's Diashock shock resistant device and Diafix oil lubrication system for reliable operation. Essential reference for repair technicians, service specialists, and watchmakers requiring precise component identification and sourcing for caliber 1520A servicing and restoration work.
Seiko Caliber 17A Technical Data and Parts List
Technical data and comprehensive parts list for the Seiko caliber 17A mechanical watch movement. This service manual documents the complete mechanical specification of this non-automatic movement: 13.50mm casing diameter, 3.20mm height, and 21,600 vibrations per hour. Details the integrated Diashock shock-resistant device and precision oil lubrication system. Includes a fully numbered parts inventory covering all movement components—bridges, balance wheel assembly, mainspring, escape wheel, gear train wheels, pivots, screws, and jewel bearings. The characteristics diagram provides visual schematics of each component and illustrates how the escapement and regulator mechanism function together, making this an essential reference for technicians rebuilding or servicing this caliber.
Seiko Caliber 2118A Parts List and Exploded Views
Seiko Caliber 2118A parts list and exploded mechanical views for complete component identification and reassembly. Covers 17, 21, and 23 jewel variants with detailed part numbering, assembly diagrams, and exploded views showing the precise layout of all movement components. Essential reference material for watchmaking service, repair, and restoration work on this reliable Seiko automatic movement. Includes mechanical drawings and component diagrams necessary for accurate parts ordering and bench work.
Seiko Caliber 21A Sportslady 17 - Parts List & Technical Data
Technical parts catalog for the Seiko Caliber 21A Sportslady 17 mechanical watch movement. This service reference provides casing dimensions, maximum height, and vibration specifications essential for movement identification and assembly work. The comprehensive parts list features numbered illustrated components including barrel bridge, gear wheels, jeweled bearings, escapement assembly, and fastening screws with cross-references. A remarks section documents alternative part numbers for sourcing and compatibility verification. Designed for watchmakers, technicians, and collectors requiring accurate component data for repair, maintenance, or restoration of this popular ladies' movement.
Seiko Caliber 21C Parts List and Specifications
Technical specifications and comprehensive parts list for the Seiko caliber 21C movement, an essential reference for watchmakers and service technicians. Documents casing dimensions (17.80 x 15.30 mm), maximum height (3.50 mm), and vibration rate of 19,800 per hour, alongside detailed component numbering for every part in the assembly. Incorporates Seiko's Disashock and Diaflex shock-protection systems. Includes two annotated movement photographs for visual reference during disassembly and repair work. A remarks section outlines alternative barrel arbor and regulator specifications, allowing technicians to identify compatible replacement components and understand configuration options for this caliber.
Seiko Caliber 21D Watch Movement Parts List
Complete technical parts list and repair reference for the Seiko caliber 21D automatic watch movement, specifically the Sportslady 17J variant. This service manual provides casing dimensions (17.80 x 15.30 mm), movement specifications (19,600 vibrations per hour), and detailed exploded diagrams showing the full disassembly sequence. Covers all major components including the balance cock, barrel arbor, gear train wheels, escape pinions, and jeweled bearing assemblies. Each part includes its official Seiko reference number, making this essential for sourcing replacement components or performing complete movement overhaul and restoration work. Cross-reference notes identify compatible parts across the caliber 21D range, helping technicians match correct specifications during reassembly.
Seiko Caliber 2409A 23-Jewel Parts List
Comprehensive parts list and technical specifications for the Seiko caliber 2409A automatic watch movement, featuring 23 jewels and a beat rate of 28,800 vibrations per hour. Movement dimensions: 24.00 mm casing diameter, 7.85 mm maximum height. Includes a fully illustrated parts reference with numbered components, detailed winding stem options across three different gauges (3.80 mm, 1.26 mm, 7.05 mm), precise date dial positioning guidance, day wheel and dial disk assembly variants, and holding ring specifications for correct dial installation. An essential repair manual and service reference for watchmakers working with this classic automatic caliber.
Seiko Caliber 2415A Parts List and Technical Data
Complete parts list and technical reference for the Seiko caliber 2415A automatic watch movement. This service manual supplies part numbers for every component, detailed specifications for dial variants, winding stem configurations, setting lever types, date dial assembly options, and holding ring selections. Essential reference data includes case diameter of 19.00mm, maximum height of 4.38mm, and operating frequency of 28,800 vibrations per hour. Technical remarks cover winding stem specifications, setting lever function, date dial configuration, and holding ring compatibility — the practical guidance needed when servicing or assembling this movement. Whether you're performing routine maintenance or executing a complete overhaul, this repair documentation provides the precision specifications and part identification required for accurate work on the 2415A caliber.
Seiko Caliber 2418A - Technical Data and Parts List
Complete technical data and parts list for the Seiko caliber 2418A automatic watch movement, a 23-jewel mechanism measuring 24.00mm in diameter and 4.55mm in height, beating at 28,800 vibrations per hour. This workshop manual provides essential reference for watchmakers and technicians servicing this movement, with comprehensive parts numbering and component identification diagrams covering the barrel, gear train, hairspring, escapement assembly, and date mechanism. Detailed material specifications for every component ensure accurate identification and proper sourcing during repair or restoration work.
Seiko Caliber 2517A Parts List and Exploded Views
Parts list and exploded mechanical views for the Seiko caliber 2517A automatic wristwatch movement, used in Seikomatic Lady Calendar models. This workshop manual covers the complete component breakdown with detailed part diagrams, original Seiko part numbers, and step-by-step assembly sequences essential for service and repair work. Includes precision views of the escapement, gear train, calendar mechanism, and mainspring barrel to support accurate identification and reassembly of internal components. Ideal for watchmakers, technicians, and collectors performing caliber 2517A maintenance and restoration.
Seiko Caliber 2706A 17j Watch Movement Parts List
Comprehensive parts list and technical specifications for the Seiko caliber 2706A automatic watch movement. This 17-jewel movement measures 17.20mm in diameter and 5.70mm in height, operating at 28,800 vibrations per hour. The manual provides detailed exploded views of all major assemblies including the barrel and train-wheel bridge, balance cock, intermediate ratchet wheel, and oscillating weight, along with a complete parts nomenclature cross-referenced with official part numbers. Documents the automatic winding mechanism, sweep second hand, day and date calendar with quick-set function, bilingual day-of-week display, and Diashock shock resistance system. Essential reference for technicians, watchmakers, and repair professionals working on this widely-used mid-range movement, offering the precision detail needed for accurate reassembly, parts sourcing, and service procedures.
Seiko Caliber 2706A 21J Movement Parts List
Technical parts catalog for the Seiko caliber 2706A automatic movement, a 21-jewel mechanism engineered for precision timekeeping. This workshop manual provides a complete parts list with individual reference numbers for every component, alongside detailed technical specifications including case diameter of 17.20 mm, maximum height of 5.70 mm, and operating frequency of 28,800 vibrations per hour. Movement diagrams and component illustrations guide technicians through the assembly and identification of each part. The catalog covers the calendar function mechanism with integrated day-and-date display, the shock-resistant device protecting the balance staff, and the sweep second hand configuration. An essential service manual for anyone performing maintenance, repair, or restoration work on this reliable automatic movement.
Seiko Caliber 4206A 17-Jewel Technical Data and Parts List
Technical data and complete parts list for the Seiko caliber 4206A 17-jewel automatic wristwatch movement. This workshop manual provides detailed technical specifications including movement dimensions (17.2 mm diameter, 5.5 mm height) and operating frequency (21,600 vibrations per hour), along with a comprehensive parts reference system using numerical designations. The documentation covers configuration options for key components such as day-wheel dial variants, date dial selections, and holding ring alternatives, making it essential for movement repair, servicing, and parts identification. Ideal for watchmakers, technicians, and collectors requiring accurate movement data and parts sourcing information.
Seiko Caliber 4216A Parts List and Exploded Diagrams
Seiko caliber 4216A parts list and exploded diagrams for the 17-jewel automatic movement. This workshop resource provides comprehensive part numbering and material specifications for every mechanical component in the movement, making it essential for watchmakers performing repair, restoration, or maintenance on this reliable workhorse caliber. Includes detailed exploded views that show how each part fits within the assembly, enabling technicians to identify components accurately during disassembly and reassembly. Part numbers and material designations are clearly marked throughout, supporting both routine service intervals and deeper mechanical work.
Seiko Caliber 4219A Parts Catalog
Seiko Caliber 4219A Parts Catalog — comprehensive parts list and technical reference for this 23-jewel automatic movement. Covers the 23.4 mm diameter case with maximum height of 5.6 mm and 21,600 vibrations per hour specification. Includes complete numbered parts inventory with detailed technical drawings and material specifications for every component. Documents the day/date calendar mechanism and the Diashock shock-resistant device protecting the balance assembly. Also covers configuration notes for day wheel and date wheel setup across different crown positions and calendar frame arrangements, essential for accurate reassembly and adjustment of this movement.
Seiko Caliber 5245A - 25 Jewels Technical Data and Parts List
Seiko Caliber 5245A Technical Data and Parts List — 25-Jewel Automatic Movement. Complete service documentation for this robust mid-sized automatic caliber, featuring a 25.60 mm casing diameter and 7.95 mm maximum height, operating at 28,800 vibrations per hour. The manual includes comprehensive parts inventory with exploded diagrams and component references essential for technicians performing maintenance, repair, and assembly work. Detailed technical notes address setting lever configurations, date finger variants, dial holding ring specifications, and critical assembly tolerances. Whether rebuilding this movement from components or conducting routine overhaul work, this parts list and technical reference provides the precision data needed for proper restoration.
Seiko Caliber 5246A 25J Parts List
Complete parts list and material specifications for the Seiko caliber 5246A 25-jewel automatic movement. Provides precise component identification with part numbers covering the barrel, train wheels, escape wheel, balance assembly, and all associated internal components. Technical specifications include case diameter 25.60mm, maximum height 7.95mm, 28,800 vibrations per hour, automatic winding with manual override and sweep seconds hand, date and calendar functions. Dedicated sections address setting lever variants, date finger configurations, date dial positioning, and holding ring specifications tailored to different case types. Essential reference for watchmakers, repair technicians, and movement specialists performing service, maintenance, or restoration work on this durable mid-range automatic caliber.
Seiko Caliber 5626A Parts List - 25 Jewels
Comprehensive parts list and technical documentation for the Seiko Caliber 5626A automatic movement, a 25-jewel Swiss-style mechanism widely used in mid-range dress watches. This workshop manual provides detailed exploded views of the complete movement assembly, breaking down how each component integrates within the 25.60mm diameter case. Specifications include 4.50mm maximum height and 28,800 vibrations per hour beat rate. The parts list catalogs every component essential for service and repair — from the train wheel bridge and pallet fork to the balance staff, setting lever assembly, escape wheel, and all associated wheels, springs, and fasteners. Detailed technical data covers setting lever selection criteria, precise date dial positioning requirements, day-disk assembly configuration with dial star integration, and holding ring dimensions for proper reassembly. Includes numbered part references throughout for quick cross-reference during repair or restoration work. An indispensable service manual for technicians maintaining or restoring Seiko 5626A movements.
Seiko Caliber 5626B Parts List and Technical Specifications
Comprehensive parts list and technical specifications for the Seiko caliber 5626B watch movement. This repair manual provides detailed component diagrams and assembly guidance for service technicians working with this 25.60mm diameter movement. Specifications include maximum height of 7.450mm and operating frequency of 28,800 vibrations per hour. The parts list covers all major subassemblies essential for movement service and restoration: barrel assembly, train wheel stack, pallet fork, balance wheel, transmission wheel, and setting lever mechanism. Includes numbered part references, assembly notes, and critical remarks on setting lever variants, date window configuration, day/star dial disk specifications, and holding ring dimensions. An invaluable troubleshooting and maintenance reference for watchmakers performing caliber 5626B overhauls and repairs.
Seiko Caliber 6105B Technical Data and Parts List
Complete technical data and parts list for the Seiko caliber 6105B automatic wristwatch movement. This service manual provides full part numbers and detailed specifications covering the barrel, gear train wheels, mainspring and hairspring assemblies, lever escapement components, dial and calendar mechanism parts, and all fastening hardware needed for assembly and repair work. Technical specifications include a 27.00 mm case diameter, 5.15 mm maximum height, 21,600 vibrations per hour balance wheel frequency, automatic self-winding mechanism with sweep seconds hand, instantaneous date correction via rotating crown, and Diashock shock-resistant bearing protection. An essential workshop reference for technicians servicing and maintaining this classic Japanese automatic movement.
Seiko Caliber 6106B Parts List and Assembly Diagram
Seiko Caliber 6106B parts list with detailed exploded-view assembly diagrams covering both 17-jewel and 25-jewel versions. Each component is identified with its corresponding part number, material specification, and position within the movement. The diagrams show how individual parts fit together during assembly, making this essential for anyone servicing, repairing, or restoring these reliable automatic movements. Technical characteristics are included alongside practical notes on parts availability and proper installation conditions, helping you source replacements and understand critical tolerances.
Seiko Caliber 6117A 17J Navigator Timer - Technical Data and Parts List
Technical data sheet and comprehensive parts list for the Seiko 6117A caliber movement, 17 jewels, covering Navigator Timer and World Time watch variants. Complete exploded diagrams detail the barrel bridge, wheel bridges, date wheel assemblies, clutch wheel, hour and minute hands, dial components, case screws and securing rings with corresponding part numbers for accurate identification and replacement. Specifications include 27.00 mm case diameter, 5.10 mm maximum thickness, 21,600 vibrations per hour beat rate, automatic winding mechanism with sweep seconds hand, calendar function and integrated Diashock shock protection. Essential reference for watchmakers, technicians and hobbyists performing maintenance, repair or parts identification on this classic Japanese movement.
Seiko Caliber 6119B Parts List and Technical Specifications
Complete parts list and technical reference for the Seiko caliber 6119B automatic movement, a 21-jewel mechanism found in compact dress watches from the 1970s–80s. This service manual supplies detailed component identification with factory part numbers, exploded assembly diagrams for the case, movement, dial, and hands, and precision specifications essential for repair and maintenance work. Key technical data includes 27.00 mm case diameter, maximum thickness of 5.15 mm, and operating frequency of 21,600 vibrations per hour. The documentation addresses critical service points including winding stem installation, date indicator wheel mechanics, dial configurations, and retaining ring tolerances—information that distinguishes this from generic watch repair guides and makes it invaluable for technicians rebuilding or servicing this specific caliber. Straightforward layout with annotated diagrams reduces ambiguity when sourcing replacement components or troubleshooting assembly issues.
Seiko Caliber 6138B Automatic Chronograph Parts List
Comprehensive parts list and exploded view diagrams for the Seiko caliber 6138B automatic chronograph movement. Covers both 21-jewel and 23-jewel variants with detailed component illustrations, individual part numbers, and material specifications for each assembly stage. Includes technical data on date dial configurations, day star dial disk options, and holding ring specifications essential for dial assembly and movement reconstruction. This repair manual reference is indispensable for watchmakers, service technicians, and collectors performing maintenance or restoration work on 6138B-equipped chronographs.
Seiko Caliber 6139B Automatic Chronograph Parts List
Parts list and materials catalog for the Seiko caliber 6139B 17-jewel automatic chronograph movement. This service manual provides numbered part references, mechanical component diagrams, and complete specifications for the 30-minute chronograph mechanism with detailed parts identification. Essential reference for anyone servicing, rebuilding, or sourcing replacement components for this iconic vintage chronograph caliber. Includes comprehensive parts breakdown to support accurate assembly, disassembly, and maintenance work.
Seiko Caliber 6309A 17-Jewel Movement Technical Data and Parts List
Technical data sheet and comprehensive parts catalog for the Seiko Caliber 6309A automatic watch movement, a 17-jewel workhorse widely used across Seiko's sports and dive watch lines. Detailed exploded diagrams map every mechanical component—barrel, gear train, escapement mechanism, balance wheel, calendar system, and automatic winding system—making this an essential reference for repair technicians and horologists. Full movement specifications document the 27.0 mm case diameter, 5.2 mm maximum height, and 21,600 vibrations per hour beat rate. Complete parts list with reference numbers covers every component, enabling accurate ordering and assembly verification. Includes oscillating weight interchange data for different caliber variants and dial holding ring specifications, invaluable when servicing movements across Seiko's product range or sourcing replacement parts.
Seiko Caliber 6319A Parts List and Technical Diagram
Seiko caliber 6319A parts list and technical exploded diagram for the complete automatic movement with 21 jewels. This service manual provides detailed component identification, original part numbers, and mechanical specifications essential for repair and maintenance of the day/date automatic winding mechanism. Covers the stem unlocking lever, date dial assembly configuration, day wheel with dial disk, dial retention ring, oscillating weight interchangeability notes, and rotor weight variants. A fundamental reference for watchmakers and technicians servicing this classic Seiko automatic caliber.
Seiko Caliber 6349A 23 Jewels Movement Parts List
Seiko Caliber 6349A 23 Jewels Movement Parts List and Technical Reference. Complete workshop manual for this automatic movement, covering core specifications—27.0 mm diameter, 5.2 mm height, 21,600 vibrations per hour—with detailed component diagrams and systematic parts numbering. The service manual documents the barrel and mainspring assembly, gear train wheels, hairspring, jewel settings, fastening screws, and complete escapement mechanism including lever and balance assembly. Technical illustrations clarify positional relationships and assembly sequences for accurate identification and spare parts ordering. Essential reference for watchmakers, repair technicians, and movement specialists performing maintenance, restoration, or component replacement.
Seiko Caliber 63A Technical Service Manual - Hands, Dial, Gear Train, Escapement and Governor
Seiko caliber 63A technical service manual covering the complete mechanical movement. This workshop documentation provides detailed specifications for the 27.0 mm diameter movement standing 3.4 mm tall with 21,600 vibrations per hour — essential reference data for any technician servicing this reliable Seiko caliber. The manual walks through systematic disassembly and reassembly procedures supported by numbered diagrams, ensuring precise reconstruction of the movement. Lubrication instructions specify the exact oils required, including Moebius A, Moebius V, SEIKO Watch Oil S-2, and S-6, with clear guidance on application points. Exploded diagrams isolate the hands assembly, dial, gear train, escapement mechanism, and governor for thorough understanding of how each component functions. A complete numbered parts list with assembly notes allows you to verify component presence and track proper installation sequence. Whether performing routine maintenance or executing a full overhaul, this repair manual provides the technical depth needed for confident work on the caliber 63A.
Seiko Caliber 6602B Parts List - Technical Data
Seiko Caliber 6602B Parts List and Technical Data sheet for the 17-jewel manual-wind movement. This technical parts catalog provides complete part identification with factory part numbers and material specifications for every component. Movement dimensions are 27.60 mm diameter with a maximum height of 4.45 mm; the caliber operates at 18,000 vibrations per hour and features a sweep seconds hand and date window. The design incorporates Seiko's Diashock shock-resistant bearing system and Diafix oil lubrication for reliability. The parts list covers the full assembly: mainspring barrel, gear train wheels, escape wheel, balance wheel, hairspring, and all related fasteners and settings. Essential reference for watchmakers and technicians performing service, repair, or complete overhaul work on this movement.
Seiko Caliber 6618A - Technical Data and Complete Parts List
Technical data and comprehensive parts list for the Seiko caliber 6618A automatic movement. This workshop manual includes detailed exploded views of mechanical components with part numbers, essential for repair technicians and movement restoration specialists. Full technical specifications cover a casing diameter of 23.60mm, maximum height of 3.85mm, operating frequency of 18,000 vibrations per hour, and 17 jewels. The manual documents the shock-resistant Diashock device and provides a complete parts catalog with all numbered components and their designations for accurate identification during disassembly, repair, and reassembly.
Seiko Caliber 66A Movement - Parts List and Diagrams
Technical parts list and movement diagrams for the Seiko Caliber 66A automatic watch movement. This workshop documentation covers the 17-jewel mechanism with case diameter 23.60mm and maximum height 3.85mm, operating at 18,000 vibrations per hour. The manual details the shock-resistant device and oil lubrication system essential for reliable operation and maintenance. Exploded diagrams show the complete assembly and disassembly sequence of all movement components, while the comprehensive parts list cross-references every mechanical element with factory part numbers and technical descriptions. Invaluable reference for service technicians, watchmakers, and collectors performing overhaul procedures or identifying replacement parts for this classic Seiko caliber.
Seiko Caliber 7006A Parts Catalog
Complete parts catalog for the Seiko caliber 7006A automatic movement, covering both 17 and 21 jewel variants. This service manual presents detailed parts lists with manufacturer reference numbers alongside exploded component diagrams to aid identification and ordering. Movement specifications include 27.00mm casing diameter, 4.85mm maximum height, and 21,600 vibrations per hour automatic winding. Technical remarks address winding stem geometry, date dial window configurations, day wheel and dial disk assembly, and holding ring specifications essential for proper dial installation and alignment. An indispensable workshop reference for watchmakers and repair technicians servicing this robust mid-range automatic caliber.
Seiko Caliber 7006A Parts List
Seiko caliber 7006A parts list and technical reference for the automatic winding movement derived from the 7005A platform. This service manual provides exploded diagrams with numbered component identification, allowing technicians to source and verify individual parts with precision. Movement specifications include 27.00 mm case diameter, 4.85 mm height, and 21,600 vibrations per hour beat rate. The manual includes detailed guidance on winding stem geometry, stem release lever mechanics, date wheel setup variations, and retaining ring tolerances — essential information for movement assembly, disassembly, and repair work. Useful as both a parts reference and workshop repair guide for anyone servicing this caliber.
Seiko Caliber 8800F 7 Jewels Parts List and Specifications
Service manual and parts reference for the Seiko caliber 8800F automatic movement (7 jewels). Provides complete technical specifications including 40.35mm case diameter, 7.55mm thickness, and 36,000 vibrations per hour beat rate, along with Diashock shock-resistant protection. Features detailed exploded views of all internal movement components and a comprehensive parts list with individual part numbers for barrels, gear wheels, pinions, jewel settings, mainsprings, lever assemblies, screws, and related mechanical elements. The remarks section addresses winding stem tolerances, balance cock washer dimensions, hammer adjustment disk specifications, and winding stem screw requirements — essential reference data for anyone servicing or restoring this movement.
Seiko Caliber Y621A Parts Catalogue and Technical Data
Technical data sheet and parts catalogue for the Seiko Caliber Y621A automatic winding watch movement. This service manual provides detailed exploded diagrams of all movement components with part numbers, extensive parts lists covering screws and jewels, and complete technical specifications including case diameter Ø27.4mm, height 4.95mm, 17 jewels, and 21,600 vibrations per hour. The movement incorporates three hands (hour, minute, second), automatic winding mechanism, date calendar, and instant calendar setting device. A practical lubrication guide specifies oil types and application quantities needed during assembly and maintenance work on this caliber.
Seiko Calibre 2919A 21 Jewels Parts Catalog
Seiko Calibre 2919A 21 Jewels Parts Catalog — detailed parts list and exploded view diagrams for this quartz watch movement. Provides part numbers and assembly references for all internal components including gear trains, balance wheels, springs, jewels, levers, and escapement elements. Essential reference for watchmakers performing maintenance, repair, or complete movement servicing on this caliber. Includes specification notes on winding stem options, date wheel configurations, day-of-week indicator disk variants, and case screw types to ensure correct assembly and compatibility.
Seiko Calibre 63A Service Manual - Hands, Dial and Gear Train
Comprehensive service manual for the Seiko caliber 63A, a 17-jewel mechanical movement. This repair documentation covers the complete teardown and rebuild of this 27.0 mm diameter watch movement, which vibrates at 21,600 oscillations per hour. The manual provides step-by-step disassembly and reassembly procedures supported by numbered technical diagrams, making it essential for watchmakers performing maintenance or restoration work. Lubrication guidance specifies the correct oils for each component—Moebius A, Moebius V, SEIKO Watch Oil S-2, and S-6—ensuring proper movement function and longevity. Detailed illustrated sections cover hand and dial assembly, escapement and governor mechanism operation, and the complete gear train layout with individual component identification. Also included are the setting mechanism assembly sequence and a full parts list with numbered components and dial holding ring specifications. An indispensable troubleshooting and reference resource for professional watch repair.
Seiko Calibre 6619A Sportsmatic 5 Technical Parts List
Technical parts list and detailed materials specification for the Seiko calibre 6619A automatic movement, a 21-jewel mechanism measuring 27.60mm in diameter and 6.40mm in height, beating at 18,000 vibrations per hour. This workshop manual provides exploded views and mechanical diagrams of the complete movement, with comprehensive part numbers for every component including the barrel, gear train wheels, main and intermediate bridges, balance wheel with jeweled pivots, escape wheel, lever escapement, and the full calendar mechanism incorporating both day and date display. Covers the Diashock shock-resistant bearing system and the automatic winding rotor assembly with sweep second hand. Essential reference for Sportsmatic 5 model service, repair, and restoration work.
Seiko Calibre 7025A Parts List and Exploded Views
Seiko caliber 7025A parts catalog and exploded views manual. Authoritative reference for servicing and rebuilding this automatic watch movement. Includes fully detailed numbered parts lists with part numbers, exploded assembly diagrams showing exact component positioning, and complete movement specifications: 27.00 mm case diameter, 4.60 mm maximum height, 21,600 vibrations per hour, automatic winding mechanism with sweep seconds hand, instant date-setting function, and Diashock shock-resistant bearing system. Coverage spans all major assemblies—barrel and gear train bridge, center wheel and gear set, third wheel, balance cock and complete balance assembly, mainspring and barrel arbor, all wheels and pinions through the escapement, minute and hour wheels, date change mechanism, ratchet wheel, pallet fork and staff assembly, along with comprehensive fastener specifications for screws, springs, levers, and frame components. Essential for watchmakers, horologists, and technicians performing movement service, overhaul, regulation, or replacement of worn parts.
Seiko Calibre 9119A Watch Movement Parts List
Seiko Calibre 9119A watch movement parts list with exploded view diagrams and detailed component breakdown. This comprehensive technical reference covers all mechanical components for the 15-jewel movement, including jeweled bearings, gear trains, mainspring, balance wheel assembly, escapement parts, screws, and springs—each identified with corresponding Seiko part numbers. Essential for technicians performing overhauls, repairs, or maintenance on this classic movement. Includes numbered component illustrations that serve as a visual guide for disassembly and reassembly procedures.
Seiko Digital Quartz A638A A639A Technical Guide
Technical service manual for Seiko Digital Quartz watches models A638A and A639A. This workshop guide provides complete specifications and circuit block architecture details for both models. Includes step-by-step disassembly and reassembly procedures with detailed technical diagrams to guide technicians through each stage of servicing. Covers comprehensive checking and adjustment protocols including battery voltage verification, current consumption measurement, water resistance testing, timekeeping accuracy calibration, alarm system function checks, speaker block diagnostics, and bulb replacement. An essential troubleshooting and maintenance reference for watch repair professionals working with these quartz digital models.
Seiko Digital Quartz Cal. 0138A Parts List
Complete parts list for the Seiko Digital Quartz caliber 0138A movement. This service manual provides a detailed breakdown of all numbered components with technical illustrations covering both the movement assembly and case construction. Essential reference for watchmakers and technicians performing repair, maintenance, or restoration work on this digital quartz caliber. Includes precise component identification needed for accurate parts sourcing and assembly procedures.
Seiko Digital Quartz Cal. 0644A & 0664A Technical Guide
Seiko Digital Quartz Cal. 0644A and 0664A Technical Guide — comprehensive technical reference for authorized service centers and qualified technicians. Provides complete operating specifications, display and button function details, and step-by-step time setting procedures. Includes detailed disassembly and reassembly instructions for both case and movement components, with illustrated cleaning protocols. Features a comprehensive checking and adjustment section with troubleshooting guidance. Essential reference for service and maintenance of these digital quartz models.
Seiko Digital Quartz Cal. A039A Technical Guide
Complete technical service manual for the Seiko Digital Quartz Cal. A039A alarm watch. This workshop guide delivers everything a technician needs for reliable after-sales servicing and repair work. Detailed specifications cover the movement and digital display architecture. Step-by-step instructions walk through button operation, timer and alarm function configuration, and the alarm sounding mechanism. You'll find practical guidance on the battery life indicator, selection and use of official Seiko servicing tools, and systematic case disassembly and reassembly without risk to the case or movement. Component care sections explain proper lubrication and cleaning methods to restore function and prevent damage. The comprehensive checking and adjustment procedures include a diagnostic flowchart to isolate faults quickly and verify corrections. Whether performing routine maintenance or troubleshooting a complex issue, this manual ensures consistent, professional results.
Seiko Digital Quartz Cal. A133A Parts List
Comprehensive parts list for the Seiko Digital Quartz caliber A133A, detailing every component required for assembly, repair, and maintenance of this quartz movement. The manual documents all movement plates, springs, screws, jewels, and mechanical assemblies with precise reference numbers, making it an essential reference for watchmakers performing service work or rebuilding operations on A133A movements. Covers the complete parts breakdown needed for accurate identification and sourcing of components during disassembly and reassembly procedures.
Seiko Digital Quartz Cal. A159B Parts List
Parts list for the Seiko Digital Quartz movement caliber A159B. This service documentation identifies each component of the movement with corresponding part reference numbers, covering the circuit block, liquid crystal display frame, switch spring, connector, circuit bridge plate, reflecting mirrors, speaker block, battery holder hardware, and silver oxide battery. Essential reference for technicians performing repair, maintenance, or restoration work on this quartz watch caliber.
Seiko Digital Quartz Cal. A628A Parts Catalogue
Seiko Digital Quartz Cal. A628A parts catalogue — a comprehensive illustrated reference for identifying and ordering every component, subassembly, and replacement part for this model. Each part is numbered for quick cross-reference, making it essential for service technicians, watchmakers, and repair professionals maintaining these digital quartz movements. The detailed breakdown covers the complete mechanical and electronic architecture of the A628A caliber, enabling accurate parts sourcing and efficient workshop reference during repair and maintenance work.
Seiko Digital Quartz Cal. A638A Parts Catalogue
Seiko Digital Quartz Cal. A638A Parts Catalogue — comprehensive parts list and exploded-view reference for this classic digital quartz watch movement. Provides detailed part identification numbers and assembly diagrams for all major components: integrated circuit block, battery contacts and springs, insulator elements, speaker assembly, nematic liquid crystal display module, illumination bulb, reflecting mirror, and fasteners. Specifications include 25.4 × 25.1 mm case dimensions, 4.0 mm height without battery, 32,768 Hz quartz crystal oscillator, 12/24-hour selectable display, alarm function with time signal, and back-light illumination. Battery compatibility information for multiple types included. Essential reference for technicians performing service, repair, or module replacement on this Seiko caliber.
Seiko Digital Quartz Cal. A708A, A718A Parts Catalogue
Parts catalogue for Seiko digital quartz watch movements Cal. A708A and A718A. This reference manual features detailed exploded views and systematically numbered component listings covering all mechanical and electronic parts within these movements. Whether you're identifying replacement components, ordering specific parts, or locating assemblies during repair work, the organized part designations and technical drawings make it straightforward to pinpoint exactly what you need. An essential workshop reference for anyone servicing these popular Seiko quartz movements.
Seiko Digital Quartz Cal. A827A A828A Technical Guide
Seiko Digital Quartz Cal. A827A A828A Technical Guide — comprehensive service manual for professional watch technicians. Covers complete specifications and circuit block architecture for both caliber movements. Includes step-by-step case disassembly and reassembly procedures with detailed lubrication protocols to ensure proper sealing and function. Features illustrated guidance on conducting plate assembly, rotating ring installation, glass gasket positioning, and final reassembly verification. Also addresses checking and adjustment procedures essential for accurate timekeeping and water resistance testing. Detailed technical illustrations throughout clarify component relationships and correct assembly sequence for reliable repair and maintenance work.
Seiko Digital Quartz Cal. A927A A939A Technical Guide
Technical service manual for Seiko digital quartz watches caliber A927A and A939A. This workshop manual covers complete specifications, circuit block structure, and all display functions including time, calendar, stopwatch, and alarm with selectable 12/24 hour indication. Detailed disassembly and reassembly procedures walk through the complete service sequence, with dedicated lubrication instructions for proper movement maintenance. Comprehensive checking and adjustment procedures address battery voltage, battery conductivity, current consumption measurement, water resistance verification, liquid crystal display panel contact integrity, accuracy testing under operational conditions, and functional checks of all complications. Includes detailed circuit diagrams illustrating segment relationships and C-MOS-LSI output terminal connections essential for electronics troubleshooting. This repair guide serves both bench technicians and independent watchmakers maintaining these calibers in the field.
Seiko Digital Quartz Cal. B337A Parts List
Comprehensive parts list for the Seiko Digital Quartz movement caliber B337A. This manual provides detailed component identification and part numbers essential for servicing, repair, and replacement procedures, covering all internal assemblies and individual components needed to maintain and restore this digital quartz movement.
Seiko Digital Quartz Cal. C359A Parts List
Parts list for Seiko Digital Quartz caliber C359A. Contains component illustrations with part numbers for quick identification and ordering of replacement parts. Essential reference for watch technicians and hobbyists performing maintenance, repair, or assembly work on this quartz movement. Includes detailed visual breakdowns that make sourcing the correct replacement parts straightforward.
Seiko Digital Quartz Cal. D031A Parts List
Parts list for the Seiko Digital Quartz caliber D031A. This illustrated parts catalog provides detailed breakdowns of all components and sub-assemblies found in this digital quartz movement, making it essential for watchmakers performing repairs, maintenance, or restoration work. Includes part numbers, component identifications, and assembly references needed for service and troubleshooting of D031A-equipped timepieces.
Seiko Digital Quartz Cal. D138A Parts Catalogue
Seiko Digital Quartz Cal. D138A parts catalogue — technical reference for service technicians and watchmakers. Features illustrated component identification with full part numbers, circuit block diagram, module assembly layout, and battery specifications (silver oxide, Maxell SR1120W). Covers movement architecture, block circuit design, and assembly configurations essential for accurate parts sourcing and movement identification during repair or overhaul work.
Seiko Digital Quartz Cal. D229A Parts List
Seiko Digital Quartz Cal. D229A parts list and components catalog. This service parts reference provides detailed component illustrations, assembly diagrams, and part numbers essential for identifying and sourcing replacement components for the D229A digital quartz watch movement. Technicians and watchmakers will find comprehensive visual breakdowns of internal assemblies, circuit board layouts, and mechanical subassemblies specific to this Seiko caliber. Whether you're performing routine maintenance, repair work, or movement restoration, this parts documentation ensures accurate component identification and ordering.
Seiko Digital Quartz Cal. D409A Parts Catalogue
Seiko Digital Quartz Cal. D409A parts catalogue with comprehensive illustrated parts list. Features detailed reference numbers for all case components, movement subassemblies, LCD display module, hands, dial variants, and battery specifications. An essential reference for technicians servicing or restoring Seiko digital quartz watches of this caliber, providing exact part identification and compatibility data needed for accurate repairs and replacements.
Seiko Digital Quartz Cal. F023A Parts List
Parts list for the Seiko Digital Quartz Cal. F023A digital watch movement, essential reference material for watchmakers and technicians servicing this caliber. Includes illustrated component diagrams with manufacturer part numbers for all major assemblies—LCD display module, circuit board, stepping motor assembly, case components, crystal, gaskets, and other replacement parts needed for repair and maintenance. Organized by functional section to help locate exact components quickly during disassembly and reassembly work.
Seiko Digital Quartz Cal. F033A Parts List
Comprehensive parts list for the Seiko Digital Quartz caliber F033A movement. This document provides detailed component diagrams with full part numbers and technical nomenclature covering all internal and external watch elements. Essential reference for servicing, repairing, or maintaining this specific digital quartz caliber. Includes systematic breakdown of movement assemblies, case components, and electronic elements with precise identification for accurate parts ordering and assembly procedures.
Seiko Digital Quartz Cal. F051A Parts List
Seiko Digital Quartz Cal. F051A parts list and technical reference guide for watchmakers and repair technicians. This comprehensive parts breakdown identifies every component within the F051A digital quartz movement, from case assembly and dial elements through to internal mechanisms and power supply specifications. Each part is accompanied by its corresponding part number for accurate ordering and replacement during service or repair work. Essential reference documentation for anyone maintaining or restoring Seiko digital quartz watches of this caliber.
Seiko Digital Quartz Cal. F421A Parts List
Seiko Digital Quartz Cal. F421A parts list and technical breakdown for watch movement assembly and repair. This service manual component reference guide maps every integrated circuit, LCD display segment, battery holder, and housing element with precise part numbers and exploded diagrams. Essential for technicians servicing this popular quartz movement, whether replacing the SEIKO TR912SW silver peroxide battery, reseating LCD panel connections, or sourcing individual wear parts. Detailed assembly schematics show component placement and orientation throughout the movement, making this parts catalog invaluable for watchmakers and repair specialists working on F421A-equipped timepieces.
Seiko Digital Quartz Cal. L012A Parts List
Comprehensive parts list for Seiko Digital Quartz caliber L012A, featuring detailed component illustrations and reference numbers covering the complete movement and case assembly. Essential reference for technicians and watchmakers performing service work, repairs, or component replacement on this digital quartz movement. The technical documentation provides systematic identification of all internal parts with corresponding part numbers, making it invaluable for ordering replacements or conducting a full movement service.
Seiko Digital Quartz Cal. L221A Parts List
Comprehensive parts list for the Seiko Ladies Digital Quartz caliber L221A. This illustrated catalog provides detailed component identification with factory reference numbers, covering the complete movement and case assembly. Essential for technicians performing repairs, replacements, or service work on this popular Seiko digital quartz model. Includes organized component diagrams and part callouts to ensure accurate identification and ordering of replacement parts.
Seiko Digital Quartz Cal. L423A Parts List
Comprehensive parts list for the Seiko Digital Quartz Cal. L423A movement, featuring detailed illustrated diagrams with reference numbers for all internal components and subassemblies. Essential reference for watchmakers and technicians servicing or repairing L423A digital quartz watches. Covers every replaceable part from the circuit board to the case components, making it indispensable for accurate parts identification and ordering during workshop repair and maintenance procedures.
Seiko Digital Quartz Cal. S023A Parts List
Parts list for the Seiko Digital Quartz Cal. S023A movement, providing detailed component diagrams and part numbers essential for maintaining and servicing this digital quartz module. Covers the Toshiba WG3 battery and all integrated internal components. A critical reference for workshop technicians and repair professionals — the digital module assembly is permanently bonded to the case back and cannot be separated, making accurate parts identification vital before any service work. Includes exploded views and manufacturer part numbers for ordering replacements.
Seiko Digital Quartz Cal. S024A, S025A Parts Catalogue
Parts catalogue for Seiko Digital Quartz movements Cal. S024A and S025A. This document provides detailed component specifications and reference numbers for both calibres, covering dial designs, integrated circuit blocks, switch springs, battery contacts, connectors, crystal unit dampers, liquid crystal display panels, fasteners, and battery technical data. Includes component photographs and part identifiers essential for repair, maintenance, and parts ordering. A practical reference for watchmakers and technicians servicing these popular quartz digital movements.
Seiko Digital Quartz Cal. S025A Technical Guide
Comprehensive service manual for the Seiko Digital Quartz Cal. S025A movement. This technical reference covers all essential specifications and circuit block architecture needed for repair and maintenance work. Detailed disassembly and reassembly procedures walk through case and module separation with proper lubrication points identified throughout. The guide includes specific electrode configurations for the liquid crystal display panel, ensuring correct reassembly orientation. Troubleshooting and adjustment procedures address battery recharging cycles, circuit signal transmission verification, solar battery performance testing, current consumption analysis, timekeeping accuracy measurement, and switch contact conductivity checks. A practical workshop resource for technicians servicing this quartz movement.
Seiko Digital Quartz Cal. S229A Parts List
Parts list for the Seiko Digital Quartz Cal. S229A movement, featuring detailed illustrated breakdowns and comprehensive part numbers across all assembly stages. Covers the complete movement architecture including case back, stem, crown, and internal mechanical components, plus the electronic subsystems: circuit board layout, LCD display module, battery contacts, and connection points. Essential reference for technicians performing maintenance, repair, or component replacement on this digital quartz model.
Seiko Digital Quartz Cal. SO24A Technical Guide
Seiko Digital Quartz Cal. SO24A technical service manual covering the complete architecture and operation of this precision quartz movement. Details specifications and circuit block structure alongside practical guidance on display functions including time, calendar, and stopwatch modes with 1/100 second timing resolution. The repair and maintenance sections walk through case and module disassembly and reassembly with step-by-step lubrication protocols. Includes detailed liquid crystal display electrode mapping for troubleshooting display issues. Comprehensive adjustment and diagnostic procedures address battery voltage verification, conductivity testing, current consumption measurement, accuracy checks, and systematic switch component inspection—essential reference for technicians performing service on this caliber.
Seiko F039A Digital Quartz Parts List
Seiko F039A digital quartz watch movement parts list with detailed exploded views and part numbering. Covers the circuit block assembly, switch components, liquid crystal display frame, battery guard, insulating spacers, reflecting mirror, illumination bulb, springs, screws and all fastening hardware. Essential reference for technicians servicing or rebuilding this quartz movement, with clear identification of every component and corresponding Seiko part numbers.
Seiko F231A Digital Quartz Watch Parts List
Comprehensive parts list for the Seiko Cal. F231A digital quartz watch movement. This manual details every numbered component with exploded views and precise part illustrations—essential for technicians performing maintenance, repair, or reassembly of F231A caliber movements. Includes identification and sourcing information for all internal mechanisms, making it invaluable for watchmakers, service centers, and parts departments managing Seiko digital quartz watches from this era.
Seiko G139A Quartz Module Parts Catalogue and Technical Guide
Seiko G139A quartz module parts catalogue and technical guide covering this precision liquid crystal timepiece component. The workshop manual provides complete specifications for the 27.4mm diameter, 5.73mm height module featuring a nematic liquid crystal FEM display, along with a comprehensive parts list identifying all 11 components. Includes exploded diagrams showing battery assembly, circuit blocks, liquid crystal panel, reflecting mirror, frame, connectors, and insulators. Step-by-step disassembly and reassembly procedures walk technicians through module service, with dedicated battery installation instructions. The circuit block structure diagram documents the crystal unit, upconverter coil, solid condenser, bulb, transistors, and supporting components. Technical specifications detail the 1/4 multiplex LCD driving system, stopwatch capability to 30 hours, timer function, alarm system, and illuminating light function, supplemented by current consumption data for diagnostics and power budgeting. An essential service reference for repair technicians and parts specialists working with Seiko G139A modules.
Seiko G757A Digital Quartz Parts List
Seiko G757A digital quartz parts list covering caliber G757A movement. This technical reference provides detailed part numbers and illustrations for every component—integrated circuits, display modules, PCBs, switches, springs, battery contacts, and LCD panel—making it indispensable for watch technicians and service centers ordering genuine Seiko replacement parts. Whether troubleshooting a failed module or conducting routine maintenance, this parts manual ensures you identify and source the correct components quickly and accurately.
Seiko H021B H022A H023A Parts Catalogue & Technical Guide
Complete parts catalogue and technical guide for Seiko calibers H021B, H022A, and H023A hybrid quartz movements. Provides detailed movement specifications including outside diameter (Ø31.0 mm), casing diameter (Ø30.0 mm), height (5.5 mm), and 5 jewels. Features comprehensive specifications for analog and digital sections, stepping motor drive systems, display systems with time/calendar, world time, stopwatch, and alarm functions. Includes numbered component diagrams showing case back, gasket, case ring, movement, dial ring, dial, and button assemblies. Details lubrication types (Moebius A, Moebius F, Silicone Oil), battery specifications (SB-BU SR1130W, 1.55V, 2-year life), and measuring gate information. Essential reference for parts identification and technical specifications.
Seiko H127A Digital Quartz Parts List
Seiko H127A digital quartz parts list with detailed component photography and reference numbering for all major watch assemblies. Covers circuit blocks, liquid crystal display panel, movement holder, screws, and gear train mechanism. Essential reference document for technicians servicing or restoring this caliber, providing the exact part identification needed for accurate sourcing and reassembly.
Seiko H448A Quartz Watch Parts Catalogue
Complete parts catalogue and exploded assembly diagram for the Seiko H448A quartz movement. This technical reference provides part numbers for every internal component—gear trains, balance springs, integrated circuit modules, battery contact assemblies, liquid crystal display panel, and precision fasteners. Includes component specifications and compatibility notes essential for ordering replacement parts or performing authorized service work. Invaluable reference for watch technicians, repair centres, and anyone maintaining or restoring this dependable quartz calibre.
Seiko H449A Quartz Parts Catalogue
Comprehensive parts catalogue for the Seiko Cal. H449A quartz movement. Features detailed exploded views and systematic component identification, making it an essential reference for watch technicians and repairers working on this popular caliber. Includes precise part numbers and assembly diagrams to support accurate identification and sourcing of replacement components. Ideal for professional watchmakers and service centers maintaining or restoring H449A equipped timepieces.
Seiko H461A Quartz Movement Parts Catalogue
Seiko H461A quartz movement parts catalogue covering reference 2j. This comprehensive parts list features detailed component identification with factory reference numbers and exploded assembly diagrams. Covers all key functional modules: battery clamp, circuit block, piezoelectric elements, LCD panel frame, coil block, connector, reflecting mirror, and winding stem subassemblies. Essential technical reference for technicians working on Seiko quartz watch repairs and movement servicing. Includes clear part diagrams and assembly structure breakdown for accurate identification and ordering of replacement components.
Seiko H601A Movement - Parts Catalogue and Technical Guide
Parts catalogue and technical guide for the Seiko H601A hybrid quartz movement, providing comprehensive service and repair documentation. Details the analogue-digital display configuration with 3 hands and nematic liquid crystal digital section, step motor driving system with load compensation, and multiplex driving architecture for digital control. Movement specifications include 24.5mm outside diameter (between 6 and 12 o'clock), 23.0mm between 3 and 9 o'clock, and 2.5mm height. The manual covers complete numbered parts list with exploded views, disassembly and reassembly procedures, circuit block structure diagrams, and segment-electrode relationship mapping for the LCD panel. Includes detailed installation instructions for battery, hands, winding stem, switch spring, train wheel bridge, and reflecting mirror. Features regulation via trimmer capacitor, 1 jewel, SEIKO SR920W or Maxell SR920W battery (2-year service life at 1.55V), with accuracy specification better than 15 seconds monthly. Essential troubleshooting and maintenance reference for watch technicians and repair professionals working on this hybrid movement.
Seiko H801A Parts Catalogue and Technical Guide
Seiko H801A hybrid quartz watch movement parts catalogue and technical reference guide. Covers the Cal. H801A movement specifications (28.5 mm diameter, 3.0 mm height) with detailed technical data for both analog and digital display sections. Includes movement layout diagrams, exploded parts illustration with numbered components, and guidance on case back assembly, gaskets, buttons, hands, dial alignment, winding stem, and internal mechanisms. Details the driving system architecture, display system functions including calendar and time display modes, battery specifications (SR920W alkaline cell, approximately 2 years service life, 1.55V output), and lubrication requirements for proper movement operation. Essential technical resource for service technicians and watch repair professionals working with this hybrid movement platform.
Seiko Hattori Y432B Parts List
Parts list for the Seiko Hattori Y432B watch movement caliber. This service manual provides detailed component references essential for repair technicians and watchmakers servicing this quartz movement. Covers wheels, bridges, mainspring and hairspring assemblies, jeweled bearings, precision screws, coil block assemblies, battery clamp hardware, rotor and stator elements, and circuit board insulation components. Includes a combination table documenting center wheel, cannon pinion, and hour wheel variants across types a, b, and c, allowing technicians to identify correct part specifications for different production configurations. Ideal for workshop reference during disassembly, maintenance, and parts replacement procedures.
Seiko Kinetic Cal. 7D46/7D48 Instructions Manual
Complete instruction manual for Seiko Kinetic Cal. 7D46 and 7D48 watches. This service and operation guide covers the Automatic Generating System that powers the watch through natural wrist movement, power save function for extended battery life, time relay function, perpetual calendar with automatic date correction, display and button operation, screw-lock crown adjustment, precise time and calendar setting procedures, power reserve guidelines and specifications. Includes detailed sections on waking the watch from power save mode and understanding two-second interval second hand movement characteristic of kinetic movements. Essential reference for owners and technicians maintaining these reliable quartz models.
Seiko L823A Digital Quartz Parts Catalogue
Seiko L823A digital quartz parts catalogue with comprehensive illustrated component listings. This reference shows all internal modules, subassemblies, and individual parts required for assembly, maintenance, and service repair. Each component is numbered and accompanied by detailed photographs to aid in identification and correct reassembly. Essential resource for watchmakers and technicians working on this model.
Seiko Lassale Cal. 1230A Quartz Watch Parts Catalogue
Parts catalogue for the Seiko Lassale Cal. 1230A quartz watch movement. This technical reference provides detailed exploded diagrams of all major assemblies and subsystems, paired with a comprehensive parts numbering system that enables precise identification and sourcing of components. Whether you're performing routine maintenance, troubleshooting a mechanical issue, or sourcing replacement parts, the systematic layout and complete parts list make it straightforward to locate the exact component you need. An essential workshop resource for anyone servicing or restoring this model.
Seiko Lassale Cal. 5939A Quartz Parts Catalogue
Seiko Lassale Cal. 5939A quartz movement parts catalogue with detailed illustrated component breakdown. This technical reference features numbered parts identification and complete specifications for every component within the 5939A caliber. Essential resource for watchmakers, technicians, and service centers performing repair, maintenance, or restoration work on Lassale models equipped with this specific movement. Includes exploded diagrams and part references necessary for sourcing replacement components and understanding movement architecture.
Seiko Lassale Cal. 6730A Parts List
Parts list for the Seiko Lassale Cal. 6730A quartz watch movement. This detailed parts catalogue provides component illustrations with corresponding part numbers covering the complete movement assembly—barrel, gear train, escapement, electronic circuit components, case, dial, and hands. An essential reference for watchmakers performing repair, maintenance, or restoration work on this caliber, or for sourcing replacement components. Includes organized schematics showing how each part relates to the overall movement structure.
Seiko Lassale Cal. 7750A Parts Catalogue
Parts catalogue for the Seiko Lassale Cal. 7750A quartz watch movement. Features exploded diagrams of the complete assembly with numbered component identification, covering gear train wheels and pinions, jeweled bearings, integrated circuit blocks, battery contacts, and fasteners. Essential reference for technicians performing repairs, maintenance, or detailed servicing on this specific movement. Includes comprehensive parts list with individual reference numbers for each component and subassembly.
Seiko Lassale Cal. 7752A Quartz Movement Parts List
Comprehensive parts list and component catalog for the Seiko Lassale Cal. 7752A quartz movement. This documentation details every numbered part within the caliber and includes exploded diagrams with cross-referenced part numbers for accurate identification during disassembly and reassembly. Essential for professional watchmakers, service centers, and experienced technicians performing service, maintenance, or component replacement on watches fitted with this movement.
Seiko Lassale Cal. 7759A Parts Catalogue
Parts catalogue for the Seiko Lassale Cal. 7759A quartz watch movement. This service manual provides an illustrated breakdown of the complete movement assembly, with precise part numbers and detailed component identification for every internal element. Essential reference for watch technicians performing repairs, servicing, or restoration work on this caliber.
Seiko Lassale Cal. 8420B Quartz Parts Catalogue
Comprehensive parts catalogue for the Seiko Lassale Cal. 8420B quartz movement. Features detailed exploded views that clearly show how each component fits within the assembly, paired with a complete parts list organized by part numbers. This technical reference is essential for technicians performing repairs, replacements, or service work on watches fitted with this specific quartz movement. The catalogue provides the precision information needed to identify and source genuine components accurately.
Seiko Lassale Cal. 9443A Parts Catalogue
Comprehensive parts catalogue and technical reference for the Seiko Lassale Cal. 9443A quartz watch movement. This workshop manual includes a detailed dial diagram, exploded component view, and a complete parts list with individual reference numbers for every component. The technical section covers the movement's core specifications: 32.768 Hz main oscillator, 40.960 Hz auxiliary oscillator, 2-pole step motor, and trimmer capacitor regulation system. You'll find detailed information on the day/date calendar instant-setting device and battery life indicator function, along with the specific combinations and variations used in center wheel, fourth wheel, and hour wheel assemblies (types a and b). The catalogue also documents all day star dial disk variations, date dial options, and the precise positioning of day corrector pins. Essential for anyone servicing, repairing, or sourcing parts for this movement.
Seiko Lassale Cal. 9550A Quartz Parts Catalog
Complete parts catalog for the Seiko Lassale Cal. 9550A quartz watch movement, featuring detailed exploded views and component photographs with part numbers for every assembly. The documentation provides full technical specifications including 23.3 mm casing diameter, 1.6 mm height without battery, 7 jewels, and 32,768 Hz oscillator frequency. Two comprehensive pages of annotated component illustrations map the movement architecture with reference designations, followed by complete parts nomenclature and a detailed remarks section covering center wheel and pinion variants, hour wheel configurations, and battery type information. Essential reference for watch repair technicians and movement specialists performing maintenance, restoration, or parts identification on this popular quartz caliber.
Seiko Lassale Quartz Cal. 8420A Parts List
Parts list and technical specifications for the Seiko Lassale Quartz Cal. 8420A movement. This illustrated parts catalog provides detailed component diagrams with precise numbering for all internal watch movement elements. An essential reference for service technicians, watchmakers, and repair professionals identifying, sourcing, or replacing specific parts within this quartz movement. Includes exploded views and assembly layouts typical of factory documentation.
Seiko Lassale Quartz Cal. 9442A Parts Catalogue
Seiko Lassale Quartz Cal. 9442A parts catalogue — comprehensive illustrated parts diagrams with reference numbers for every component, complete parts list with part numbers and designations, and full technical specifications including 25.6 mm casing diameter, 3.1 mm maximum height, 8 jewels, and 32.768 kHz oscillation frequency. Also covers technical notes on wheel combinations and date dial configuration options. An essential reference manual for service technicians, watchmakers, and repair professionals working with this ultra-thin quartz movement.
Seiko Lassale Quartz Cal. 9442A/9443A Technical Data
Technical data and service reference for Seiko Lassale quartz watches caliber 9442A and 9443A. This workshop manual covers complete specifications for both movements, including 3-hand timekeeping, electronic circuit reset functionality, and train wheel setting mechanisms. Details the dual crystal oscillator design operating at 32,768 Hz and 40,960 Hz with trimmer capacitor regulation for frequency fine-tuning. Documents the 8-jewel movement rated for 1.55V mercury battery operation and includes battery life indicator circuitry. Provides circuit block architecture with main and auxiliary trimmer capacitors, MOS-IC components, and crystal oscillator configurations. Essential troubleshooting procedures cover output signal verification, battery voltage and continuity testing, circuit block conductivity checks, reset condition assessment, coil block operation, and current consumption measurement. Incorporates time accuracy testing methodology using the QT-99 Quartz Tester with QT-Adapter for precision validation. Case specifications: 25.6mm diameter with movement heights of 2.8mm (9442A) or 3.1mm (9443A) excluding battery. Practical reference for technicians performing calibration, diagnosis, and repair of these widely serviced Seiko movements.
Seiko Lassale Quartz CAL.9550A CAL.9559A Service Manual
Service manual for Seiko Lassale quartz watches, CAL.9550A and CAL.9559A models. This workshop manual covers complete technical specifications for both calibers, including a 7-jewel movement with step motor system and load-compensative driving pulse technology. Detailed circuit block architecture is provided, with CMOS-IC and crystal oscillator schematics. Step-by-step disassembly and reassembly procedures are illustrated with numbered component diagrams for precise rebuilding. A dedicated lubrication guide covers all bearing surfaces and moving parts. Checking and adjustment procedures address output signal verification, hand setting alignment, battery voltage and conductivity testing at 1.55V, circuit block conductivity measurement, coil block resistance values, reset and train wheel positioning, gear train operation, setting mechanism function, accuracy calibration, current consumption measurement, water resistance verification, switch component testing, and final appearance inspection. Essential reference for watch technicians and service centers performing routine maintenance or complete overhaul on these movements.
Seiko Lassale Quartz Technical Guide - Calibers 7750A, 7751A, 7752A, 7759A
Seiko Lassale quartz technical guide and service manual for four caliber variants—the 7750A and 7759A two-hand movements, plus the three-hand 7751A and 7752A. This workshop reference delivers detailed specifications, circuit block structure diagrams, and systematic disassembly and reassembly procedures with numbered component illustrations. Lubrication specifications cover Moebius A and SEIKO watch oil S-6 applications. The adjustment and checking sections span output signal verification, battery voltage and conductivity testing, circuit block and coil block resistance measurement, gear train inspection, setting and calendar mechanism function, accuracy assessment, current consumption analysis, battery life indicator operation, water resistance verification, and final appearance inspection. Mechanical exploded views and detailed movement component identification support diagnosis and restoration work.
Seiko M159A Quartz LC Chronograph Parts List
Complete parts list for the Seiko M159A Quartz LC Chronograph digital watch. Essential reference for repair, maintenance, and component replacement. Includes detailed specifications: case diameter Ø 27.0 mm, maximum height 6.1 mm, quartz crystal oscillator frequency 32.768 Hz. Features labeled component illustrations with identification numbers for accurate parts sourcing and assembly. Ideal for watch technicians, repair professionals, and service-oriented enthusiasts.
Seiko M516A Digital Quartz Parts List
Complete parts catalog for the Seiko M516A digital quartz watch (Cal. M516A), essential for service technicians and watchmakers. Includes detailed exploded views and component illustrations with reference numbers identifying every mechanical and electronic part. Covers the full assembly breakdown from case and crystal to circuit board, stepper motor, display module, and all internal components. Use this parts list alongside your workshop manual or service manual for accurate identification, sourcing, and replacement of components during repair or overhaul work.
Seiko M705A Diving Watch Parts Catalogue and Technical Guide
Complete parts catalogue and technical guide for the Seiko M705A diving watch, serving as both a comprehensive repair manual and reference for service technicians. Provides detailed component identification with step-by-step disassembly and reassembly procedures essential for workshop maintenance. Covers this 1/4 multiplex LCD dive watch with Ø34.2 mm diameter, 6.48 mm height, nematic liquid crystal display with field effect mode, depth measurement capability to 80 meters, and monthly accuracy of less than 15 seconds. Indispensable for anyone performing hands-on service work or parts sourcing on this model.
Seiko M929A Digital Quartz Watch Parts List
Parts list and illustrated component breakdown for the Seiko caliber M929A digital quartz watch. Includes designated part numbers for case modules, circuit blocks, battery contacts, LCD display assembly, and all electronic components. Essential reference for technicians performing repair, maintenance, or restoration work on this model. Covers each subassembly with clear part identification, making it straightforward to locate replacement components or verify correct assembly sequences during service procedures.
Seiko N94JA Parts Catalogue and Technical Guide
Complete parts catalogue and technical service manual for the Seiko N94JA quartz chronograph movement. This workshop guide delivers detailed specifications, component diagrams with numbered part references, and step-by-step disassembly and reassembly procedures for professional servicing. Covers mode hand adjustment techniques, circuit block architecture, battery installation specifications, wheel and gear arrangement with identification tables, and accuracy verification parameters. Includes illustrated technical explanations of mode correction, hand positioning alignment, and internal mechanism functions. An essential repair reference for technicians servicing this movement.
Seiko Pulsar V653B Movement Parts Catalogue and Technical Guide
Complete parts catalogue and technical guide for the Seiko Pulsar V653B quartz chronograph movement. This workshop manual provides detailed movement specifications, step-by-step disassembly and reassembly procedures with numbered technical illustrations, comprehensive parts identification cross-referenced to exploded diagrams, and precise setting positions for auxiliary train wheel bridge components. Covers battery installation procedures including reset methods, dial removal techniques, hand installation, winding stem removal, and train wheel bridge configuration options. The parts list documents all 50 individual movement components with visual references, making this an essential repair manual for professional technicians and experienced watchmakers servicing this classic chronograph movement.
Seiko Quartz 1E20A 1E50A Technical Data
Technical data reference for Seiko Quartz caliber 1E20A and 1E50A movements. This service manual provides complete specifications for both calibers, detailed circuit block architecture, and a fully illustrated parts list. Disassembly procedures walk through component breakdown step-by-step, while checking and adjustment sections cover critical parameters: output signal verification, battery voltage testing, coil block performance, reset condition confirmation, timing accuracy, and current consumption measurement. Essential reference for technicians maintaining or troubleshooting these quartz movements.
Seiko Quartz 2002 Cal. 3803A Parts List
Seiko Quartz 2002 Cal. 3803A parts list with complete technical specifications and component breakdown. This service manual covers the 25.60 mm case diameter, 5.30 mm maximum thickness watch movement, featuring a 16.384 Hz quartz oscillator and step motor system driving the day and date calendar with bilingual weekday changeover. Detailed exploded views show every component with corresponding part numbers, essential for watchmakers performing repairs, service adjustments, or parts replacement on this classic Seiko quartz caliber.
Seiko Quartz 3003 Cal.0843A Parts List
Complete parts list and exploded views for the Seiko Quartz caliber 0843A (Cal.0843A), a precision 9-jewel movement built around a 32.768 Hz crystal oscillator and step motor system with trimmer capacitor regulation. This reference covers all component part numbers for a movement designed in a compact 24.0 mm case diameter with maximum height of 4.8 mm. The documentation provides detailed breakdowns of the calendar mechanism, electronic circuit mechanism, gear train, setting mechanism, and motor block—essential for technicians performing service, repair, or parts identification on this movement. Includes exploded diagrams showing the precise assembly and positioning of each component.
Seiko Quartz 3003 Cal.4823A Parts List
Seiko Quartz 3003 Cal.4823A parts list and component identification guide for this 7-jewel wristwatch movement. Provides detailed parts diagrams with reference numbers covering all mechanical and electronic components of the 28.6mm case. Specifications include 7.8mm maximum height, 32.768 Hz quartz frequency, 5-pole stepper motor system, rapid-second adjustment capability, instant calendar with bilingual day/date changeover, and battery life indicator with two-second hand pulse interval. Essential reference for watchmakers and technicians performing maintenance, repair, or complete overhaul of this caliber. Includes every component identification needed to source replacement parts or verify movement integrity during service work.
Seiko Quartz 4004 (Cal. 4633A) Technical Guide and Parts List
Complete technical documentation and service manual for the Seiko Quartz 4004 movement (caliber 4633A). This workshop guide contains movement specifications, functional schematic, detailed calendar mechanism operation, case assembly procedures, battery life indicator function, step-by-step disassembly and reassembly with technical illustrations, lubrication specifications, and a comprehensive parts list cross-referenced with part numbers and component identification diagrams. Covers electronic circuit layout, gear train function, setting mechanism operation, calendar function remarks including dial variations and day-of-week indicator configurations. An essential repair and maintenance reference for technicians servicing this popular Seiko quartz caliber.
Seiko Quartz 4004 Cal.0903A Parts List
Comprehensive parts list for the Seiko Quartz 4004 Cal.0903A movement, an essential service manual resource for technicians and watchmakers. The documentation provides detailed component diagrams and assigned part numbers across the entire assembly, covering the movement case, balance wheel assembly, 32.768 Hz crystal oscillator, stepper motor system, gear train mechanism, calendar complication, and integrated electronic circuit block. Movement specifications include a case diameter of 27.00 mm and maximum height of 5.30 mm. This repair manual serves as an authoritative reference for identifying individual parts, verifying component compatibility, and sourcing replacement components during overhaul or troubleshooting work on Cal.0903A equipped models.
Seiko Quartz Cal. 1320A Parts List
Seiko Cal. 1320A quartz movement parts list with numbered component references and detailed parts identification. This technical documentation provides a complete parts diagram and component listing essential for repair, maintenance, and service of this movement. Includes all component designations and part numbers for accurate identification and ordering of replacement parts.
Seiko Quartz Cal. 1320A Parts List
Seiko Quartz Cal. 1320A parts list with detailed illustrated breakdown and reference designations for all movement components. Covers five distinct center wheel and hour wheel assembly combinations with corresponding specifications. Includes battery requirements: silver peroxide cells SEIKO TR621SW or SB-DG. Essential reference for watchmakers performing maintenance, repair, or reassembly of this quartz movement.
Seiko Quartz Cal. 1421A 1428A Technical Guide
Technical service manual for Seiko quartz watch movements Cal. 1421A and Cal. 1428A. Provides complete specifications and circuit block architecture essential for repair and maintenance work. Detailed disassembly and reassembly procedures walk through the movement systematically, with dedicated lubrication instructions for correct application at each stage. Includes comprehensive checking and adjustment protocols covering output signal verification, battery voltage and conductivity testing, coil block assessment, current consumption measurement, timing accuracy verification, and final cosmetic inspection. An indispensable workshop reference for technicians servicing these Seiko quartz calibers.
Seiko Quartz Cal. 1421A Parts Catalogue
Seiko Quartz Cal. 1421A parts catalogue for watch movement repair and service. Provides detailed illustrated parts list with numbered component identification, exploded assembly views, and complete technical specifications including 15.1 × 13.0 mm case dimensions, 2.8 mm height, 32,768 Hz crystal oscillator frequency, and step motor drive system. Covers assembly procedures and alternative component combinations for different battery options, making this an essential workshop manual reference for technicians servicing or restoring this compact quartz movement.
Seiko Quartz Cal. 1428A Parts Catalogue
Parts catalogue and technical specifications for the Seiko Quartz Cal. 1428A movement. Includes exploded view diagrams of all components with assigned part numbers, precise dimensional data (15.1 x 13.0 mm case, 3.2 mm height without battery), and operating specifications covering the 32,768 Hz quartz crystal frequency and 2 jewels. The comprehensive parts list identifies over 40 individual components and fasteners. An essential reference for watchmakers, service technicians, and repair specialists working with this compact quartz caliber.
Seiko Quartz Cal. 14A Parts List
Seiko Quartz Cal. 14A parts list with complete illustrated component catalog. Reference guide featuring all individual parts for this quartz movement, organized with part numbers for ordering and technical identification. Essential for watchmakers and service technicians performing maintenance, repair, or rebuild work on this caliber. Includes detailed diagrams showing proper component placement and assembly relationships.
Seiko Quartz Cal. 14B Parts List
Parts list and technical reference for the Seiko Quartz Cal. 14B movement. This document provides detailed visual component diagrams alongside a comprehensive numbered parts reference table, making it essential for technicians performing service, maintenance, or repair work on this caliber. Covers mechanical specifications including the 32,768 Hz quartz crystal frequency, two-pole step motor architecture, and trimmer condenser regulation system. Also includes battery specifications, screw types and sizes, bridge assemblies, gear wheels, and circuit block construction details — everything needed for accurate parts identification and workshop-level service procedures.
Seiko Quartz Cal. 14C Parts Catalogue
Parts catalogue for the Seiko Quartz Cal. 14C movement, providing a detailed illustrated parts list with numbered component identification. Covers all essential internal elements including bridges, wheels, springs, levers, rotors, battery terminals, screws, and jewels. This technical reference enables watchmakers and repair technicians to identify and source individual components for servicing and restoration work on Cal. 14C equipped timepieces.
Seiko Quartz Cal. 1E20A & 1E50A Technical Guide
Technical guide for Seiko quartz movements Cal. 1E20A and 1E50A. Provides complete specifications including movement size (Ø9.5 mm / Ø12.8 mm), height (2.7 mm), battery type (Maxell SR5125W, 1.55V), and 5 jewels. Includes detailed circuit block structure schematics, disassembly and reassembly procedures with lubrication points, and parts identification through numbered diagrams. Comprehensive checking and adjustment section covers output signal verification, battery voltage testing, coil block function, reset condition confirmation, frequency accuracy, and current consumption measurement.
Seiko Quartz Cal. 2320A Parts List
Parts list for the Seiko Quartz Cal. 2320A ladies watch movement, providing detailed identification of all mechanical and electronic components. Includes illustrated component diagrams cross-referenced with corresponding part numbers—essential reference material for service technicians, watchmakers, and movement rebuilds.
Seiko Quartz Cal. 2320A Parts List
Complete parts list and technical reference for the Seiko Quartz caliber 2320A movement. This repair manual covers all individual components with detailed exploded diagrams and component numbering that correspond to the parts breakdown. Essential for watchmakers performing maintenance, repairs, or restoration work on this popular quartz caliber. Includes assembly relationships and part identification needed for accurate reassembly and servicing.
Seiko Quartz Cal. 2620A Parts List
Seiko Quartz Cal. 2620A parts list with complete technical specifications for this classic quartz movement. Provides exploded views, individual part numbers, and full characteristic data needed for service and repair work. Features a 32,768 Hz quartz crystal oscillator paired with a step motor driving system and trimmer condenser regulation for accurate timekeeping. Essential reference for watchmakers performing maintenance, calibration, or component replacement on this caliber.
Seiko Quartz Cal. 2620B Parts List
Seiko Quartz Cal. 2620B parts list — the essential reference for anyone working with this popular 1970s–80s quartz movement. Covers component identification with factory part numbers, technical specifications including the 32,768 Hz tuning-fork oscillator and step-motor drive system, and detailed parts nomenclature. Includes component photographs keyed to part designations, trimmer capacitor adjustment data, and documented variants for center minute wheel assemblies with silver and gold-plated cannon pinion options, hour wheel configurations, and winding stem variants. This workshop manual excerpt provides the precision reference data needed for movement service, repair, and parts cross-referencing.
Seiko Quartz Cal. 2622A Parts List
Comprehensive parts list for the Seiko Quartz caliber 2622A movement. Features detailed component illustrations paired with exact part numbers and reference designations, essential for ordering replacement parts, performing repairs, or conducting maintenance on this standard quartz watch mechanism. Ideal for watchmakers, repair technicians, and service centers working with Seiko quartz watches from this caliber generation.
Seiko Quartz Cal. 2623A Parts List and Technical Data
Comprehensive parts list and technical data for the Seiko Quartz Cal. 2623A movement. Includes numbered exploded-view diagrams with complete component identification, detailed assembly specifications, and parts breakdown essential for watch repair technicians and movement restoration work. Serves as an authoritative reference for locating individual components, understanding movement construction, and sourcing replacement parts for this widely used quartz caliber.
Seiko Quartz Cal. 2625A Parts List
Parts list for the Seiko Quartz movement Cal. 2625A, an essential reference for watchmakers and repair technicians. This detailed parts catalog provides component designations and full technical diagrams covering the complete movement assembly—from escapement jewels and pivot rubies to mainsprings, balance assembly, and all mechanical subcomponents. Each part is cross-referenced with its official Seiko part number, making identification and ordering straightforward during movement service, repair, or restoration work. Ideal for anyone performing maintenance on this reliable quartz caliber.
Seiko Quartz Cal. 2625B Parts List
Comprehensive parts list for the Seiko Quartz Cal. 2625B movement, featuring detailed exploded view diagrams and individual component illustrations with exact part numbers. An essential reference for watch technicians and repair professionals working with this caliber, covering all internal components and their proper identification. Ideal for ordering replacement parts, performing maintenance, or understanding the complete assembly of this quartz movement.
Seiko Quartz Cal. 2626A Parts List and Specifications
Parts list and specifications for the Seiko Quartz Cal. 2626A movement. Includes a detailed exploded diagram identifying every component with its part number and technical reference designation—essential for accurate assembly, repair, and sourcing. A comprehensive technical reference for watchmakers and technicians working on this caliber.
Seiko Quartz Cal. 2626B Parts List
Complete parts list and component reference for the Seiko Quartz Cal. 2626B movement. Includes detailed component photography with corresponding part numbers for every assembly and individual part throughout the movement. Essential reference material for watchmakers, technicians, and parts sourcing for repair and restoration work on watches equipped with this caliber.
Seiko Quartz Cal. 2628A Parts List
Comprehensive parts list for the Seiko Quartz Cal. 2628A movement, featuring detailed exploded views of all watch components and systematic reference numbering for every mechanical and electronic element. This technical documentation provides the parts identification and cross-referencing essential for repair, maintenance, and accurate component sourcing. Ideal for watchmakers, technicians, and service professionals working with this movement.
Seiko Quartz Cal. 2633A Parts List
Complete parts list for the Seiko Quartz Cal. 2633A watch movement, featuring a detailed illustrated diagram that identifies every component with its corresponding part number and technical reference. Essential reference material for service technicians, watchmakers, and anyone performing maintenance or repair work on this quartz caliber.
Seiko Quartz Cal. 2633A Parts List
Comprehensive parts list and exploded diagram for the Seiko Quartz caliber 2633A movement. This technical reference provides detailed component identification across 50+ individual part numbers, with technical specifications and visual parts catalog. Essential for watchmakers performing repair, maintenance, or restoration work on this caliber, the manual documents every mechanical and electronic element with precision drawings and part references needed for accurate reassembly and component sourcing.
Seiko Quartz Cal. 2639A Parts List
Comprehensive parts list and technical specifications for the Seiko Quartz Cal. 2639A movement. This workshop reference includes detailed component diagrams, part numbers, and assembly instructions essential for service and repair work. The documentation covers the 32.768 Hz crystal oscillator architecture, step motor drive system, and trimmer condenser frequency regulation—the core technologies that define this caliber's performance. You'll find specifications for date dial variants and battery requirements, along with all component identifiers needed to source replacements or perform a complete service. Ideal for watchmakers, technicians, and collectors maintaining or restoring Cal. 2639A equipped timepieces.
Seiko Quartz Cal. 2661A Parts List
Complete parts list and technical specifications for the Seiko Quartz caliber 2661A movement. This parts list includes detailed component diagrams with corresponding part numbers, allowing technicians and repair specialists to identify every element of this compact 17.6mm quartz movement. Technical characteristics cover the 32.768Hz crystal oscillator and step motor system that define this caliber's performance. The document provides a combination guide for configuring fourth wheel, center minute wheel, and hour wheel variants, essential for understanding assembly options and ensuring correct component selection during service or repair work. Ideal for watchmakers and service centers specializing in Seiko quartz movements.
Seiko Quartz Cal. 2A Series Parts Catalogue
Seiko Quartz Cal. 2A series parts catalogue covering movements 2A22, 2A23, 2A27, and 2A29. This illustrated parts list provides precise part numbers and technical designations for identifying train wheels, escapement assemblies, dial components, and circuit blocks. An essential technical reference for sourcing and ordering replacement parts specific to these movements.
Seiko Quartz Cal. 2A22A/2A23A/2A29A/2A32A Service Manual
Service manual for Seiko quartz watch movements covering the 2A22A, 2A23A, 2A29A, and 2A32A calibers. Provides complete specifications and circuit block diagrams for troubleshooting and repair. Includes step-by-step disassembly and reassembly procedures with detailed lubrication guidance to ensure proper movement function. Features comprehensive checking and adjustment procedures for accuracy and performance verification. Covers case disassembly instructions specific to the 2A22A diver's watch model. Contains detailed parts identification and gear train mechanism schematics for reference during service work. Includes battery replacement procedures and a periodic maintenance check schedule to keep watches running reliably. An essential workshop manual for technicians servicing these popular Seiko quartz movements.
Seiko Quartz Cal. 2A24A 2A54A Technical Guide
Technical service manual for Seiko Quartz movements Cal. 2A24A and Cal. 2A54A. This comprehensive workshop guide covers full movement specifications, detailed parts lists with Seiko part numbers for all screws and components, step-by-step disassembly and reassembly procedures illustrated with numbered technical diagrams, precision lubrication instructions for proper maintenance, and complete component identification for both calibers. The Cal. 2A24A features a lunar calendar display, train wheel setting mechanism, electronic circuit reset switch, and battery life indicator. The Cal. 2A54A adds a standard date window. Both movements employ step motor drive technology with trimmer capacitor frequency regulation. Essential reference for watch technicians performing repair, overhaul, and routine service on these popular quartz movements.
Seiko Quartz Cal. 2A32A Parts Catalogue
Parts catalogue and exploded diagram for the Seiko Quartz Cal. 2A32A movement, providing detailed component reference numbers and part identification codes essential for repair, maintenance, and service work. This parts list enables technicians and watchmakers to identify and source replacement components with precision, supporting both routine servicing and mechanical restoration of watches fitted with this caliber.
Seiko Quartz Cal. 2C20A, 2C21A Parts Catalogue
Parts catalogue for Seiko Quartz movements Cal. 2C20A and 2C21A. This comprehensive reference includes detailed exploded views of all watch components with numbered part references, assembly illustrations of train wheels and gear assemblies, circuit block schematics, and technical drawings of mechanical and electronic subassemblies. An essential resource for watchmakers, repair technicians, and collectors servicing these Seiko quartz calibers. The detailed visual breakdowns and systematic part numbering enable precise identification and sourcing of replacement components.
Seiko Quartz Cal. 2E20A Parts Catalogue
Seiko Quartz Cal. 2E20A Parts Catalogue — comprehensive parts list and component diagram for this widely-used quartz movement. Features detailed technical illustrations of every mechanical and electronic component, each with assigned reference numbers essential for accurate ordering, identification, and replacement work. Invaluable resource for watchmakers, repair technicians, and parts departments needing to source components or cross-reference assemblies for the 2E20A caliber.
Seiko Quartz Cal. 2G28A, 2G38A Parts List
Seiko Quartz Cal. 2G28A, 2G38A Parts List — comprehensive parts catalogue for these two Seiko quartz movement calibers. The manual features detailed illustrated parts breakdowns with complete part numbers and reference designations, making it essential for watchmakers performing repairs, overhauls, and module replacements. Ideal as a service reference alongside workshop manuals and repair documentation.
Seiko Quartz Cal. 3421A & 3423A Technical Guide
Technical guide for Seiko Quartz Cal. 3421A and Cal. 3423A movements. This reference manual provides detailed specifications covering movement size, casing diameter, height, regulation system, battery information, and jewel count. The circuit block architecture section illustrates the structural layout of both front and back circuit block configurations. Procedures for checking and adjustment include output signal verification, hand setting condition checks, battery voltage and conductivity testing, coil block resistance measurement, reset and second hand setting conditions, gear train mechanism alignment, setting and calendar mechanism operation, accuracy verification, current consumption analysis, water resistance assessment, and appearance and functioning checks. An essential technical reference for watchmakers servicing these Seiko quartz calibers.
Seiko Quartz Cal. 3421A Parts List
Comprehensive parts list for the Seiko Quartz Cal. 3421A movement, featuring detailed component diagrams with part numbers and assembly specifications. This reference guide provides technicians and watchmakers with the exact nomenclature and identification for all internal movement components, essential for repair, maintenance, and restoration work on watches fitted with this caliber. Includes exploded views and cross-referenced part designations for accurate ordering and correct assembly procedures.
Seiko Quartz Cal. 3423A Parts List
Seiko Quartz Cal. 3423A parts list with detailed component illustrations and part numbers. This repair manual reference guide provides a comprehensive parts breakdown organized by functional assembly, making it essential for watchmakers performing maintenance, troubleshooting, or repair work on this quartz movement. Includes a structured parts table with numbered references and identification details for every component.
Seiko Quartz Cal. 38 Series Parts List Supplement
Parts list supplement for Seiko Quartz caliber 38 series movements (Cal. 3803, 3819, 3823, 3863), issued December 1978. Details new circuit block replacements incorporating crystal oscillator and trimmer condenser integration. Includes parts replacement specifications, identification marks for circuit block variants, and regulation system adjustment notes for trimmer condenser tuning across all caliber variants.
Seiko Quartz Cal. 3863A & 3819A Parts List
Seiko Quartz Cal. 3863A & 3819A Parts List — comprehensive technical reference for these high-frequency quartz watch movements. This parts list provides detailed component diagrams with factory part numbers, essential technical specifications (25.60 mm diameter, 5.30 mm height, 6.384 kHz operating frequency), and assembly guidance for the 5-jewel Quartz 3003 model and related variants. Includes exploded views with clearly numbered part references, regulation system documentation, and configuration notes for different watch configurations. Essential reference for watchmakers, technicians, and collectors working on Seiko quartz movements of this generation.
Seiko Quartz Cal. 4110A & 4100A Technical Guide
Seiko Quartz Cal. 4110A & 4100A Technical Service Guide — comprehensive workshop manual for professional technicians servicing these electronic movements. Provides complete movement specifications and structural diagrams essential for understanding internal architecture. Covers full disassembly and reassembly workflows with clearly marked lubrication points to ensure proper mechanical function after service. Includes dedicated cleaning protocols for electronic components, critical when handling quartz oscillators and circuit elements. Detailed adjustment and verification procedures guide technicians through output signal testing, battery performance assessment, circuit block diagnostics, and coil block inspection. Features systematic time accuracy testing procedures to confirm movement performance meets factory standards. An indispensable technical reference for watch repair specialists working with these Seiko quartz calibers.
Seiko Quartz Cal. 4325A Parts List
Parts list and technical specifications for the Seiko Quartz Cal. 4325A movement. This service reference includes exploded diagrams of the complete movement assembly, detailed parts breakdown with Seiko part numbers, and full technical specifications: 18.00mm casing diameter, 4.1mm height, 2 jewels, 32.768 Hz quartz crystal oscillator, and step motor driving system with trimmer condenser frequency regulation. The manual covers setting lever variations, date dial options, and assembly procedures essential for accurate movement repair and parts identification. An indispensable workshop manual for watchmakers servicing or restoring Seiko quartz watches.
Seiko Quartz Cal. 4326A Parts List
Seiko Quartz Cal. 4326A parts list with detailed illustrated exploded views showing every component of this dual-calendar movement. Each part is identified by official Seiko part number, making it straightforward to source replacements or verify assembly sequences during repair work. The movement operates on a 32.768 Hz quartz crystal oscillator and incorporates a stepper motor system to drive the day and date display wheels independently—a common configuration in affordable Japanese watches of the 1980s and 1990s. Technical specifications for each component are included where applicable. This kind of granular parts documentation is essential for professional watchmakers and serious hobbyists undertaking movement service or restoration, as it eliminates guesswork about component placement, orientation, and the correct mating of jewels, pivots, and gear teeth. Whether you're rebuilding after cleaning or diagnosing a calendar malfunction, the exploded diagrams serve as a visual reference that photographs alone cannot provide.
Seiko Quartz Cal. 4336A Parts List
Seiko Quartz Cal. 4336A parts list and exploded diagram showing every component of this quartz watch movement with corresponding part numbers. Essential reference for watchmakers and technicians performing repairs, maintenance, or assembly work on this caliber. The illustrated catalog format makes it straightforward to identify individual parts and their positions within the movement, supporting both bench work and parts sourcing.
Seiko Quartz Cal. 5420A Parts Catalogue
Parts catalogue for the Seiko Quartz Cal. 5420A movement, providing technicians and watchmakers with detailed component identification and assembly reference. Includes a comprehensive parts diagram with numbered components covering bridge assemblies, gear trains, pinions, rotor assembly, circuit block elements, battery specification (Maxell SR6215W), and regulating switch lever. An essential reference for service work, repair operations, and component sourcing.
Seiko Quartz Cal. 5420A Parts List
Complete parts catalogue for the Seiko Quartz Cal. 5420A watch movement. This technical reference includes a comprehensive parts list with numbered component illustrations covering everything from balance wheels and escapement assemblies to precision screws, hairsprings, gear trains, jewel settings, and electronic circuitry — each part identified with factory reference numbers for accurate ordering and identification during service or repair work.
Seiko Quartz Cal. 5930A Parts List
Comprehensive parts list and component catalog for the Seiko Quartz Cal. 5930A movement. This detailed parts list supplies technicians and watchmakers with reference numbers, component identification, and high-quality photographs essential for ordering replacements, performing repairs, or conducting maintenance on this quartz caliber. Ideal for professional service work and restoration projects requiring precise part matching.
Seiko Quartz Cal. 5931A Parts List
Comprehensive parts list for the Seiko Quartz Cal. 5931A movement, featuring detailed exploded diagrams and a complete numbered reference guide for every component. This service manual is essential for identifying and ordering replacement parts, whether you're performing routine maintenance or conducting a full movement overhaul. The illustrated layouts clearly show how each part fits within the overall assembly, making it straightforward to locate specific components and understand their relationships within the movement. Ideal for watchmakers, repair technicians, and anyone servicing or rebuilding a Cal. 5931A quartz movement.
Seiko Quartz Cal. 5931A Parts List
Seiko Quartz caliber 5931A parts list with comprehensive exploded diagrams for every mechanical and electronic component. Detailed movement assembly illustrations paired with precise part numbers and reference designations make identifying replacement components straightforward. Essential reference for technicians servicing or repairing Seiko quartz watches using this caliber. Includes full component breakdown showing how major assemblies fit together, critical for anyone performing maintenance, troubleshooting, or parts replacement on 5931A movements.
Seiko Quartz Cal. 5932A Parts List
Seiko Quartz Cal. 5932A Parts List — detailed exploded-view parts documentation for this compact 22.0 mm diameter quartz movement. Covers all numbered components including gear wheels, pinions, levers, springs, jeweled bearings, fasteners, dial guard, date mechanism, and integrated circuit block. Specifications detail the 32,768 Hz quartz oscillator frequency, stepper motor drive architecture, rotary regulator adjustment, and calendar function with instant-set capability. Includes technical notes on fourth wheel gear combinations, winding stem design variants, date dial configurations, holding ring options, crystal unit shock absorption, and battery type requirements. Essential reference for technicians and service shops performing maintenance, repair, or complete overhaul of this popular Seiko quartz caliber.
Seiko Quartz Cal. 5933A Parts List
Complete parts list and exploded view diagrams for the Seiko Quartz Cal. 5933A movement, with detailed component illustrations and systematic part numbering for accurate assembly and repair reference. Essential reference material for watchmakers and technicians servicing this widely used quartz caliber.
Seiko Quartz Cal. 5C20A, 5C23A Parts Catalogue
Seiko Quartz Cal. 5C20A and 5C23A parts catalogue and workshop guide. Contains detailed exploded-view diagrams with numbered component references for both movement calibres. Technical specifications include 32,768 Hz oscillator frequency, step motor drive architecture, and rotary step switch regulation system. Features hand installation procedures, complete disassembly and reassembly instructions covering the setting mechanism, gear train, and coil block assembly. Includes systematic checking and adjustment protocols: accuracy verification, battery voltage testing, current consumption measurement, and alarm system verification procedures. Battery compatibility listed: SEIKO TR721W, Maxell SR721W (1.55V). Comprehensive indexed parts list with manufacturer part numbers for precise component identification and ordering. Essential reference for technicians servicing these widely-used quartz movements.
Seiko Quartz Cal. 6020A Parts List
Comprehensive parts list for the Seiko Quartz Cal. 6020A movement, featuring detailed component identification numbers and technical illustrations. The manual provides individual part diagrams that systematically break down all mechanical and electronic elements within the movement, making it essential for watchmakers performing repair, maintenance, or restoration work on this caliber. Each component is clearly labeled and cross-referenced to support accurate identification during disassembly and reassembly procedures.
Seiko Quartz Cal. 6020A Parts List
Complete illustrated parts list for the Seiko Quartz Cal. 6020A movement, with detailed reference numbers and component identification. Each part is clearly numbered and shown in technical drawings to simplify ordering replacements and understanding movement construction. An essential reference for technicians performing maintenance, troubleshooting, rebuild work, or full disassembly on Cal. 6020A quartz movements.
Seiko Quartz Cal. 6030A Parts List
Comprehensive parts list for the Seiko Quartz Cal. 6030A movement. This document provides detailed component illustrations with corresponding part numbers, along with a full parts diagram that maps out the complete movement assembly and all individual components. Essential reference for watchmakers, technicians, and repair specialists working on Seiko quartz movements. The clearly labeled diagrams make it straightforward to identify and order replacement parts for maintenance and service work on watches equipped with this caliber.
Seiko Quartz Cal. 6423A Parts List
Parts list for the Seiko Quartz caliber 6423A movement, designed as a technical reference for service technicians and repair specialists. Features detailed exploded view diagrams showing the complete assembly structure, individual component illustrations paired with precise part numbers for ordering replacements, battery specification for the Maxel SR1120SW cell, and a technical layout diagram of all movement components. Essential reference material for anyone performing maintenance, repair, or disassembly work on this caliber.
Seiko Quartz Cal. 6429A Parts List
Comprehensive parts list for the Seiko Quartz Cal. 6429A movement, featuring detailed exploded views and illustrated component breakdowns. This service manual provides complete part numbers and identification for every element of the movement assembly—essential for watchmakers, technicians, and repair specialists working on Seiko quartz movements. The visual references enable quick location and ordering of individual components for maintenance, repair, or restoration.
Seiko Quartz Cal. 6430A Parts Catalog
Comprehensive parts catalog for the Seiko Quartz Cal. 6430A movement, featuring exploded component diagrams and detailed parts list with factory part numbers. This service manual reference covers all specifications essential for repair and assembly work: 24.0 mm case diameter, 2.4 mm thickness, 7 jewels, 32.768 Hz oscillation frequency, 2-pole step motor, and trimmer condenser frequency adjustment. Includes battery cross-reference data for the SR1120SW form factor (Maxell SR1120SW, UCC 381, Seiko TR1120SW, Seiko SB-DS equivalents) and component position diagrams for correct orientation during reassembly. Indispensable for watchmakers, repair technicians, and movement specialists working on quartz-caliber service and parts replacement.
Seiko Quartz Cal. 6430A Parts Catalogue
Parts catalogue for the Seiko Quartz Cal. 6430A movement — an essential service manual for technicians and watchmakers handling this compact quartz caliber. The document provides detailed exploded views of the complete movement assembly, full technical specifications, and a comprehensive parts list cross-referenced with original Seiko part numbers. Movement specifications include a 24.0 mm casing diameter, 2.4 mm maximum height, 7 jewels, 32.768 Hz quartz oscillator, step motor drive system, and trimmer condenser regulation for frequency adjustment. The catalogue lists compatible battery options including Maxell SR1120SW and Seiko-approved alternatives, making it straightforward to source the correct power cell for repair and maintenance work. Whether you're rebuilding a movement or ordering individual components for workshop repair, this parts reference provides the precise identification and part numbering needed to ensure correct assembly and component replacement.
Seiko Quartz Cal. 6431A Parts Catalogue
Parts catalogue for the Seiko Quartz Cal. 6431A watch movement. This technical reference includes movement specifications and characteristics, a comprehensive parts list with identification numbers for every component, and detailed illustrated diagrams showing component layout and assembly relationships. Essential for watch technicians performing service, repair, and maintenance work on this quartz movement, or for sourcing replacement parts. PDF download includes all reference materials needed for accurate identification and ordering of genuine Seiko components.
Seiko Quartz Cal. 6432A Parts Catalogue
Comprehensive parts catalogue for the Seiko Quartz Cal. 6432A movement. Features detailed illustrated exploded diagrams with numbered components throughout, paired with an extensive parts list cross-referenced by part numbers. An essential reference for watchmakers, repair technicians, and horologists performing maintenance, service work, or component replacement on this caliber. The systematic breakdown allows precise identification of every part in the movement, from jewels and pivots to escapement components and quartz oscillator assemblies. Invaluable for ordering exact replacement parts and understanding the mechanical architecture of this reliable quartz platform.
Seiko Quartz Cal. 6433A Parts Catalogue
Seiko Quartz Cal. 6433A parts catalogue with complete technical specifications and illustrated parts list. Essential reference for service technicians and repair professionals working with this movement. Provides detailed part numbers, assembly guidance, and configuration options covering dial variants, date mechanisms, battery selections, and precise component positioning. Original Japanese printing, dated June 1981. Ideal for workshop manuals, maintenance documentation, and service repair applications.
Seiko Quartz Cal. 6439A Parts Catalogue
Parts catalogue for the Seiko Quartz Cal. 6439A movement, providing complete technical reference for service technicians and watchmakers. Features comprehensive illustrated parts diagrams with full part numbers and specifications covering the 24.0 mm diameter casing and 2.7 mm maximum height assembly. Details the quartz movement's core specifications including 7 jewels, 32.768 Hz quartz crystal oscillator, 2-pole step motor, and trimmer condenser regulation system. The parts list encompasses over 100 individual components—wheels, bridges, screws, springs, jewels, and circuit block elements—each cross-referenced for accurate identification and ordering. Includes documentation of date dial variations across models 801 through 527, along with compatible battery specifications (Maxell SR1120SW, U.C.C. 381, SEIKO TR1120SW, SEIKO SR-DS). An essential reference manual for repair, maintenance, and parts replacement of this movement series.
Seiko Quartz Cal. 65 Series Parts Catalogue
Parts catalogue for Seiko Quartz Cal. 65 series movements, featuring detailed exploded diagrams with full parts numbering and technical specifications for watch technicians and repair professionals.
Seiko Quartz Cal. 6922A Parts Catalogue
Comprehensive parts catalogue for the Seiko Quartz Cal. 6922A movement, an essential reference for watchmakers, technicians, and experienced hobbyists performing repair, maintenance, or restoration work. The document supplies detailed parts lists with factory reference numbers and exploded-view diagrams that break down every component of this precision quartz mechanism. Coverage includes train wheel assemblies, calendar and date disc mechanics, integrated circuit and coil blocks, the step rotor drive system, battery connection points, movement screws, and jewel settings. Technical specifications document the 22.0 × 21.7 mm case diameter, 32,768 Hz quartz crystal oscillator frequency, and the step rotor drive architecture with trimmer capacitor regulation for frequency adjustment. A practical workshop manual section supports disassembly, identification, and reassembly tasks. Whether servicing, restoring, or simply understanding the construction of this reliable quartz caliber, this parts catalogue provides the authoritative reference data needed for accurate work.
Seiko Quartz Cal. 6922A/6923A Technical Guide
Technical service manual for Seiko Quartz movements Cal. 6922A and Cal. 6923A. Provides complete specifications and detailed troubleshooting procedures for watchmakers and service technicians. Covers circuit block diagrams, component lubrication protocols, and step-by-step checking and adjustment methods including output signal verification, battery testing, coil block conductivity assessment, gear train inspection, accuracy validation, current consumption analysis, and water resistance testing. Essential reference for servicing these movements.
Seiko Quartz Cal. 6923A Parts Catalogue
Seiko Quartz Cal. 6923A parts catalogue with comprehensive illustrated parts diagram. Details all case components, dial assembly, hands, movement parts and fasteners with precise part numbers and cross-references. Essential reference for identifying genuine Seiko replacement components and understanding movement architecture. Useful for service technicians, watchmakers and parts sourcing. PDF download provides quick access to part identification and ordering information.
Seiko Quartz Cal. 7122A Parts List
Complete parts list for the Seiko Quartz Cal. 7122A 26.0 mm movement. Includes exploded views with component reference numbers and parts breakdown.
Seiko Quartz Cal. 7123A Parts List
Complete parts list and assembly guide for the Seiko Quartz caliber 7123A movement. Detailed numbered diagrams identify every internal component, from balance wheel assemblies to gear trains and circuit board elements. Includes the original Maxell SR1130SW battery specification for accurate power source replacement. Essential reference for watchmakers performing maintenance, repair, or complete service overhauls on this popular quartz caliber. The systematic component breakdown makes it straightforward to source genuine Seiko parts and verify correct assembly sequences during workshop procedures.
Seiko Quartz Cal. 7123A Parts List
Seiko Quartz Cal. 7123A Parts List — complete illustrated parts breakdown for this 32,768 Hz quartz movement. This service manual delivers detailed part numbers and exploded diagrams for all mechanical elements: dial, movement plates, jewels, screws, springs, and related components. Essential reference for watchmakers, technicians, and movement specialists performing repair, maintenance, or reassembly of this Seiko caliber.
Seiko Quartz Cal. 7126A Parts List
Comprehensive parts list for the Seiko Quartz Cal. 7126A movement. This two-page illustrated parts catalog provides detailed mechanical diagrams with numbered component references covering over 80 individual parts — springs, jewels, screws, pivots, wheels, and specialized movement components essential for repair and maintenance work. Each diagram includes assembly references to help technicians locate and identify every element of this quartz caliber. An indispensable workshop resource for anyone servicing or restoring Seiko quartz watches fitted with this movement.
Seiko Quartz Cal. 7223A Parts List
Comprehensive parts list and service catalog for the Seiko Quartz Cal. 7223A movement. This reference document provides detailed part numbers, technical illustrations, and component breakdowns covering all mechanical and electronic assemblies essential for repair, maintenance, and restoration work. Includes exploded views and precise identification of every internal component, making it an indispensable resource for watch technicians and horologists working with this popular quartz caliber. Whether you're performing routine maintenance or troubleshooting specific issues, this parts catalog ensures you can source exact replacement components and understand the movement's complete assembly structure.
Seiko Quartz Cal. 7320A 7321A Technical Guide
Seiko Quartz Cal. 7320A 7321A Technical Guide — comprehensive service manual for these two automatic quartz movements. Covers movement specifications, circuit block architecture, and step-by-step disassembly and reassembly of the hand-setting mechanism and clutch wheel regulation system. Includes practical procedures for verifying and adjusting output signal characteristics, battery voltage and conductivity checks, coil block performance, rotor and train wheel calibration, timekeeping accuracy adjustment, and current consumption measurement. Features detailed exploded diagrams and full component identification to support troubleshooting and maintenance work on these Seiko calibers.
Seiko Quartz Cal. 7430A Parts Catalogue
Seiko Quartz Cal. 7430A parts catalogue and technical reference guide for watch technicians and repair specialists. Complete parts list with exploded diagrams and component identification for this widely-used quartz movement. Includes official part numbers, assembly sequences, and detailed specifications for all internal mechanisms—32.768 Hz crystal oscillator, two-pole step motor, and trimmer capacitor regulation system. Technical notes cover winding stems, lower end-piece screw positioning for the third wheel, and battery requirements. Essential workshop manual for servicing or rebuilding this movement; supplies the precision component references needed for accurate repair and reassembly.
Seiko Quartz Cal. 7430A, 7431A, 7439A Technical Guide
Technical service manual for Seiko quartz watch movements Cal. 7430A, 7431A, and 7439A. Covers time indication variants with 2 or 3 hands, optional date and calendar functions, and includes detailed circuit block structure diagrams. Features step-by-step disassembly and reassembly procedures with numbered component illustrations to guide technicians through movement servicing. Lubrication specifications ensure proper operation of all mechanical elements. Comprehensive checking and adjustment sections address output signal verification, hand setting accuracy, battery voltage and conductivity testing, coil block resistance measurement, gear train mechanism function, setting mechanism operation, reset and train wheel positioning, timekeeping accuracy, current consumption analysis, water resistance assessment, and battery life indicator calibration. This repair guide is essential for watchmakers performing maintenance and restoration on these popular quartz calibers.
Seiko Quartz Cal. 7431A Parts Catalogue
Comprehensive parts catalogue for the Seiko Quartz Cal. 7431A movement. This workshop reference provides a detailed parts list with numbered component references and exploded diagrams showing the precise assembly of all movement elements. Includes battery specification SEIKO TR721SW. An essential service manual resource for technicians performing repairs, maintenance, or restoration work on watches equipped with this caliber. The numbered parts breakdown and illustrated views make identification and ordering of replacement components straightforward for watch service professionals.
Seiko Quartz Cal. 7432A Parts Catalogue
Seiko Quartz Cal. 7432A Parts Catalogue — detailed parts list and illustrated exploded diagram for this quartz watch movement. Identifies every numbered component with corresponding part numbers, covering the balance complete assembly, circuit block, rotor, dial, bezel, case back, stem, screws, and all mechanical and electronic parts essential for service, repair, or restoration work on this caliber. Invaluable reference for technicians performing maintenance or rebuilds.
Seiko Quartz Cal. 7433A Parts Catalog
Seiko Quartz Cal. 7433A Parts Catalog — comprehensive parts list and illustrated breakdown for this compact 22.0 mm quartz watch movement. The catalog provides detailed exploded views of all major assemblies including dial, hands, gear train, mainspring, and fasteners, plus a complete component inventory with factory part numbers. Essential reference for anyone servicing or rebuilding this movement, which features a 32,768 Hz quartz crystal oscillator, stepper motor drive system, and integrated day-date complication. Includes technical specifications for each part, making it ideal for repair technicians, watchmakers, and parts sourcing. This workshop manual covers the internal mechanics of one of Seiko's classic battery-powered movements from the quartz era.
Seiko Quartz Cal. 7433A Parts Catalogue
Parts catalogue for Seiko Quartz Cal. 7433A movement, presenting a detailed illustrated breakdown of all components with full part numbers. Covers the dial, hands, gear train, hairsprings, case screws, jewel settings, and complete internal assembly of this quartz mechanism. Specifies the SEIKO TR721SW battery required for operation. Essential reference for technicians performing maintenance, repair, or restoration work on this caliber, or for sourcing individual replacement parts during service.
Seiko Quartz Cal. 7434A Parts Catalogue
Comprehensive parts catalogue for the Seiko Quartz Cal. 7434A movement, featuring exploded diagrams that identify every component with corresponding part numbers. Includes a complete screw reference chart for accurate identification and replacement during service work. Essential reference for watchmakers performing repairs, maintenance, or restoration on this caliber. Uses SEIKO TR721SW battery.
Seiko Quartz Cal. 7439A Parts Catalogue
Seiko Quartz Cal. 7439A parts catalogue covering the complete movement assembly. Features detailed exploded view diagrams with full part numbers and reference illustrations for all major components: balance wheel bridge, calendar plate, wheel train elements, clutch wheel, setting lever, date dial, circuit block, coil block, step rotor, battery insulators, crystal cushion, screws and tubes. Essential reference for service technicians and watchmakers performing repairs, maintenance or restoration work on this quartz calibre. Includes the visual breakdown needed to identify and source individual components during disassembly and reassembly.
Seiko Quartz Cal. 7518A and 7918A Technical Guide
Technical service manual for Seiko quartz movements Cal. 7518A and Cal. 7918A. This workshop reference covers full specifications and mechanical features, highlighting component differences from predecessor models. Includes step-by-step disassembly and reassembly procedures, with detailed lubrication guidance for dial mechanisms and setting trains. Contains complete parts lists, exploded mechanical diagrams, and illustrated assembly instructions essential for movement maintenance and repair.
Seiko Quartz Cal. 7518A Parts List
Parts list and exploded-view guide for the Seiko Quartz caliber 7518A movement. Provides detailed component illustrations paired with part numbers, making it essential reference material for technicians servicing or repairing this quartz movement. Useful for identifying individual parts, sourcing replacements, and understanding assembly relationships. Ideal for watch repair professionals and movement specialists working with this specific Seiko caliber.
Seiko Quartz Cal. 7545A Parts List
Seiko Quartz Cal. 7545A parts list with comprehensive exploded views and technical illustrations of the complete movement. Detailed component identification paired with factory part numbers makes this an essential reference for anyone servicing or restoring this popular quartz mechanism. Covers all mechanical elements, electronic circuitry, the integrated calendar function, stepper motor system, and trimmer capacitor regulation circuit. Precise part breakdowns and cross-referenced diagrams enable accurate assembly, disassembly, and component sourcing for workshop and repair applications.
Seiko Quartz Cal. 7546A Parts List
Comprehensive parts list for the Seiko Quartz Cal. 7546A movement, featuring detailed exploded views and systematically numbered references for every component. This manual provides the precise identification needed for servicing, maintenance, and troubleshooting of this popular quartz caliber. Each part is clearly illustrated and cross-referenced, making it indispensable for watch technicians and repair professionals working on Seiko 7546A movements.
Seiko Quartz Cal. 7548A Parts List
Parts list and exploded diagrams for the Seiko Quartz Cal. 7548A movement. Provides complete identification of all components with part numbers and technical specifications. Details the day-date calendar mechanism with stepper motor drive system, along with assembly instructions and component positioning within the movement—essential reference material for technicians servicing or rebuilding this caliber.
Seiko Quartz Cal. 7549A Parts List
Seiko Quartz Cal. 7549A movement parts list with complete exploded views and technical assembly reference. Details all jewel positions, gear trains, bridges, levers, rotors, and date wheel components alongside spring specifications. Covers the step motor system powering calendar and day-date functions with numbered part references and assembly sequence information. Essential technical documentation for watchmakers and repair technicians servicing this popular quartz caliber.
Seiko Quartz Cal. 7549A, 7548A Technical Guide
Technical service manual for Seiko Quartz diver's watches Cal. 7549A and 7548A. Provides complete specifications and battery replacement procedures alongside the periodic check system required for depth-rated models. Details step-by-step disassembly and reassembly of case components across 600m, 300m, and 150m variants, with dedicated sections on movement maintenance, calendar mechanism operation, circuit block and coil block function, and setting mechanism adjustment. Includes lubrication point maps, exploded parts diagrams, and maintenance schedules for routine servicing and troubleshooting.
Seiko Quartz Cal. 7559A Parts List
Comprehensive parts list for the Seiko Quartz Cal. 7559A movement, essential for watchmakers and repair technicians servicing this popular quartz caliber. The manual provides a detailed parts diagram with numbered component references covering the complete mechanical assembly, date and day wheel mechanism, illuminating light assembly, integrated circuit blocks, and step motor system. Includes battery specification: Maxell SR43SW. Use this parts list as your reference guide when performing maintenance, repairs, or sourcing replacement components for Cal. 7559A movements.
Seiko Quartz Cal. 7812A Parts List
Complete parts list for the Seiko Quartz Cal. 7812A movement with detailed exploded views and component diagrams. Each part is identified with its number and designation. This reference is essential for technicians servicing and rebuilding 7812A movements—a must-have for any watchmaker working on this caliber. Covers part identification and assembly procedures.
Seiko Quartz Cal. 7813A Parts List
Comprehensive parts list for the Seiko Quartz caliber 7813A movement, featuring a detailed exploded view diagram with reference numbers for every component. This technical reference manual is essential for watch technicians performing repairs, maintenance, or restoration work on 7813A movements. The parts list identifies all internal mechanisms and subassemblies, making it an invaluable troubleshooting and spare parts reference for professional watchmakers, service centers, and experienced hobbyists.
Seiko Quartz Cal. 7903A Parts List
Parts list for the Seiko Quartz Cal. 7903A ladies watch movement. Provides a comprehensive illustrated parts catalog with numbered component diagrams enabling accurate identification and sourcing of internal movement elements. Cross-referenced part numbers for all mechanical and electronic components of this quartz timekeeping system, including oscillator circuit, step motor drive, gear train, and setting mechanism parts. Essential reference for technicians performing maintenance, repair, or complete movement overhaul.
Seiko Quartz Cal. 7918A Parts List
Comprehensive parts list and exploded diagrams for the Seiko Quartz Cal. 7918A movement. This workshop manual provides detailed component breakdowns with factory part numbers for all mechanical and electrical elements, essential for watchmakers performing maintenance, repair, or module replacement on this quartz caliber. Each part is clearly identified in the exploded views, making it straightforward to source components and understand the movement's assembly sequence.
Seiko Quartz Cal. 7A07A Parts Catalog
Parts catalog for the Seiko Quartz Cal. 7A07A automatic movement. This detailed parts list features exploded-view diagrams of all internal components with their exact part numbers, making it essential for watchmakers, service technicians, and repair specialists. Includes comprehensive illustrations of the mainplate, oscillating weight, bridges, and fully assembled movement configurations. Ideal for movement identification, parts sourcing, and workshop reference during disassembly and reassembly.
Seiko Quartz Cal. 7A28A Parts Catalogue
Seiko Quartz Cal. 7A28A Parts Catalogue — comprehensive parts list and reference guide for the iconic 7A28A chronograph movement. This catalogue provides exploded diagrams of every internal component, making identification and sourcing straightforward for watchmakers and technicians. Covers both dial variations fitted to 7A28A watches, with the movement's characteristic 1/5 second chronograph function fully detailed. Each part carries its official Seiko reference number for accurate ordering and assembly verification. An essential workshop resource for anyone servicing or restoring quartz chronographs from this generation.
Seiko Quartz Cal. 7A38A Parts Catalog
Complete parts catalog for the Seiko Quartz Cal. 7A38A chronograph movement, essential for watchmakers and repair technicians servicing this iconic integrated chronograph caliber. The catalog presents a detailed exploded diagram mapping all internal components with comprehensive part numbering and cross-references. Covers the full 29.0 mm diameter, 4.6 mm height movement architecture including the main plate, all bridges, complete gear train assembly, chronograph mechanism with its specialized clutch and cam systems, and calendar module components. Provides part numbers for approximately 80+ individual components, enabling precise identification and sourcing of every element from jewels and springs to specialized chronograph wheels and calendar levers. Indispensable reference for movement disassembly, repair, and restoration work on 7A38A equipped watches.
Seiko Quartz Cal. 7A48A Parts List
Complete parts list for the Seiko Quartz Cal. 7A48A movement, featuring a detailed exploded diagram that identifies every component with its corresponding part number. This workshop manual covers the full mechanical and electronic assembly structure, making it essential for technicians performing repairs, servicing, and component replacement on watches fitted with this quartz caliber. The numbered diagrams allow precise identification of each part, from the circuit board assembly to the motor and gear train, streamlining any maintenance or troubleshooting work on this popular movement.
Seiko Quartz Cal. 8122A and 8123A Technical Guide
Technical service and repair guide for Seiko quartz movements Cal. 8122A and Cal. 8123A. This workshop manual provides complete specifications and detailed circuit block diagrams, explaining the load-compensating driving pulse system used in these movements. Includes step-by-step disassembly and reassembly procedures with fully numbered parts identification, professional lubrication instructions, and comprehensive checking and adjustment techniques. Coverage spans output signal verification, hand setting procedures, battery voltage and conductivity testing, coil block diagnostics, gear train mechanism inspection, precision adjustment methods, current consumption measurement, and switch component conductivity verification. Essential reference for service technicians and repair professionals working with these Seiko quartz calibres.
Seiko Quartz Cal. 8122A Parts Catalog
Parts catalog for Seiko Quartz caliber 8122A—an essential reference for watchmakers, technicians, and service centers working with this movement. Documents specifications, exploded movement diagrams, and a comprehensive indexed parts list with factory part numbers for accurate ordering and assembly. Covers date dial variants, retaining ring configurations, battery contact tubes, and battery type specifications. Serves as the technical foundation for movement repair, parts replacement, and routine maintenance on watches fitted with this caliber.
Seiko Quartz Cal. 8222A/8223A/8229A Technical Data
Technical data manual for Seiko Quartz movements 8222A, 8223A and 8229A rated water resistant to 10 atmospheres. This service manual covers the complete technical specification and operation of these three-hand movements with integrated date calendar system, electronic reset switch and seconds setting device. The documentation details the internal circuit block architecture including the trimmer capacitor and crystal oscillator that regulate timekeeping. Step-by-step disassembly and reassembly procedures are provided for all major components: the calendar mechanism, dial-side parts, circuit block, coil block and four-jewel gear train, along with lubrication points and techniques. Checking and adjustment procedures address critical performance parameters including output signal verification, hand setting accuracy, battery voltage and conductivity testing, circuit block conductivity verification, reset mechanism function, gear train operation, setting mechanism response, calendar function, movement accuracy, current consumption measurements and water resistance validation. This workshop manual serves as the authoritative technical reference for service technicians and qualified repairers working with these popular Japanese quartz movements.
Seiko Quartz Cal. 8223A Parts List
Seiko Quartz Cal. 8223A Parts List – Complete technical reference for this popular quartz movement. This parts list provides detailed component identification through exploded view diagrams, essential for repair technicians and watchmakers servicing or restoring 8223A-equipped watches. All movement components are catalogued with accurate part numbers, enabling precise replacement ordering during disassembly and reassembly. Technical specifications cover the 32.768 Hz crystal frequency and step motor system architecture, along with trimmer capacitor adjustment parameters for regulation. Whether performing routine maintenance, troubleshooting timekeeping issues, or conducting a complete movement overhaul, this documentation delivers the exact component data and visual references needed to work confidently on Seiko quartz caliber 8223A movements.
Seiko Quartz Cal. 8229A Parts List
Comprehensive parts list for the Seiko Quartz Cal. 8229A movement. Features a fully illustrated exploded diagram with numbered component callouts and complete part nomenclature cross-referenced to official Seiko part numbers. Essential reference for watch repair technicians and service professionals working with this popular quartz caliber.
Seiko Quartz Cal. 8522A Parts Catalogue
Parts catalogue for the Seiko Quartz Cal. 8522A movement. Features detailed exploded view diagrams with part numbers and component illustrations clearly labeled with reference designations. Essential for identifying and ordering replacement components, servicing the Cal. 8522A, and understanding the complete assembly of this quartz caliber. Covers all major subassemblies and individual parts needed for maintenance and repair work on this movement.
Seiko Quartz Cal. 8522A/8523A Technical Guide
Technical service manual for Seiko Quartz caliber 8522A and 8523A movements. This workshop guide covers full specifications and circuit block architecture, with detailed disassembly and reassembly procedures for both movements. Includes lubrication specifications, calendar and setting mechanism construction, and a complete troubleshooting framework. Comprehensive adjustment and checking procedures address output signal verification, battery voltage testing, circuit block conductivity measurement, reset and train wheel positioning, coil block validation, current consumption analysis, and accuracy calibration. An essential repair reference for horologists and watch technicians working with these Seiko quartz calibers.
Seiko Quartz Cal. 8523A Parts Catalogue
Parts catalogue for the Seiko Quartz movement caliber 8523A, providing technicians and watchmakers with detailed component specifications and assembly information. Includes technical characteristics, exploded views of all major subassemblies, part numbers with full descriptions, and dimensional data for train wheels, calendar mechanism, battery indicator system, screws, springs, and related fasteners. Features combination variations and reference charts for fourth wheel, center minute wheel, and hour wheel configurations to support accurate parts identification and assembly procedures.
Seiko Quartz Cal. 8620A Parts Catalogue
Parts catalogue for the Seiko Quartz Cal. 8620A movement, essential for watchmakers and repair technicians. Features a detailed exploded view diagram with part numbers for every component, covering the casing, gear train wheels, pinions, circuit block, coil assembly, rotor, battery, jewels, screws, and tubes. This service manual provides the precise reference needed for ordering replacement parts, identifying worn components during overhaul, and executing accurate reassembly of the 8620A quartz movement. Invaluable for workshop use and parts inventory management.
Seiko Quartz Cal. 8620A Parts Catalogue
Complete parts catalogue for the Seiko Quartz Cal. 8620A movement, essential for service technicians and watchmakers performing repairs or maintenance on this compact quartz caliber. Exploded diagrams show the exact layout and relationships of all internal components, paired with precise part numbering that allows accurate identification and ordering of replacement pieces. Technical specifications detail the 16.4 × 15.3 mm case dimensions, 32,768 Hz quartz oscillator, two-pole stepper motor configuration, and trimmer capacitor tuning system that governs timekeeping regulation. The detailed parts list assigns identification numbers to every component, eliminating guesswork during assembly or disassembly. Includes critical information on two distinct center wheel and cannon pinion assembly variants, ensuring you source the correct combination for your specific movement variant. Battery compatibility section covers approved replacements including Seiko TR621SW, Seiko SB-DG, Maxell SR621SW, and Toshiba SR621SW cells, so you can confidently specify the right power source. This workshop manual–style reference is indispensable for anyone undertaking Cal. 8620A service, repair, or restoration work.
Seiko Quartz Cal. 8621A Parts Catalogue
Seiko Quartz Cal. 8621A Parts Catalogue — a technical reference for watchmakers and movement technicians servicing this compact battery-powered calibre. The parts catalogue presents the full specifications of the 8621A movement (18.4 x 15.3 mm casing, 32,768 Hz quartz frequency, 2 jewels), with exploded-view diagrams detailing every component in the assembly. You'll find a complete numbered parts list with Seiko part numbers, wheel setting combinations, battery compatibility information (SEIKO TR621SW, SH-OG, Maxell SR621SW, Toshiba SR621SW), and assembly notes to guide correct reconstruction. Essential for anyone performing maintenance or repair work on 8621A movements.
Seiko Quartz Cal. 8621A/8620A Technical Guide
Comprehensive technical guide and service manual for Seiko Quartz movements Cal. 8621A and Cal. 8620A. This repair manual provides detailed movement specifications and circuit block architecture essential for workshop technicians. Includes step-by-step disassembly and reassembly procedures with technical diagrams, complete lubrication instructions for optimal performance, and systematic checking and adjustment protocols. Covers critical diagnostics including output signal verification, battery voltage assessment, conductivity testing, coil block evaluation, reset procedures, and train wheel calibration. Also includes accuracy measurement techniques and current consumption analysis to ensure proper movement function and power efficiency.
Seiko Quartz Cal. 8A20A/8A21A Parts List
Seiko quartz stopwatch parts catalogue covering calibers 8A20A (4-jewel) and 8A21A (6-jewel). Features comprehensive exploded-view diagrams with precise part numbers and component identification throughout the movement. Details battery specifications (SR44W, 1.55V; IEC standard 357; SONY EVEREDY 397 equivalent), screws, dial assembly, switch mechanisms, terminals, circuit blocks, connectors, and battery contacts. Essential service manual reference for technicians servicing or restoring these stopwatch movements. Supports accurate parts ordering and assembly verification during repair work.
Seiko Quartz Cal. 8C22A, 8C23A Parts Catalogue
Complete parts catalogue and technical service manual for Seiko Quartz movements Cal. 8C22A and 8C23A. This workshop reference provides detailed specifications, comprehensive parts list with numbered diagrams, circuit block structure breakdown, and step-by-step disassembly and reassembly procedures including lubrication instructions. Covers assembly diagrams for date mechanisms, train wheel configurations, and electrical components. Essential troubleshooting and maintenance guide for watch repair technicians working with these movements.
Seiko Quartz Cal. 9020, 9021, 9029 Parts List
Seiko quartz watch movement parts list covering calibres 9020, 9021, and 9029. Features detailed exploded diagrams showing how each movement component fits together, paired with comprehensive numbered parts references for precise identification and sourcing. Essential reference for watchmakers, repair technicians, and service specialists working on these three popular Seiko quartz calibres. Includes all internal movement parts with clear technical illustrations. A foundational service manual resource for anyone maintaining or rebuilding these movements.
Seiko Quartz Cal. 9022A Parts Catalogue
Parts catalogue for the Seiko Quartz Cal. 9022A movement. This technical reference includes detailed illustrated parts diagrams with component illustrations and corresponding part numbers, enabling precise identification and sourcing of replacement components for repair and maintenance work on this quartz movement.
Seiko Quartz Cal. 93A Parts List
Parts catalogue for the Seiko Quartz caliber 93A movement. Includes complete parts identification with reference numbers and visual illustrations of all components. Features two movement views (top and bottom) and a comprehensive parts breakdown with numbered references. Specifies Maxell SR916SW battery compatibility. Essential reference documentation for watchmakers identifying and ordering replacement parts for this quartz movement.
Seiko Quartz Cal. 9552A Parts Catalog
Seiko Quartz Cal. 9552A parts catalog — a comprehensive reference for technicians servicing this compact 23.3 mm movement. The catalog presents an illustrated parts breakdown with full part numbers alongside detailed specifications for every component. You'll find the core movement characteristics clearly documented: 32.768 Hz quartz crystal oscillator, 2-pole step motor, and rotary step switch regulation system that defines this caliber's timekeeping behavior. The parts list covers the train wheel bridge, setting mechanism, circuit blocks, and battery options, making it straightforward to identify replacements or diagnose wear during repair work. This is the reference document watch technicians rely on for accurate ordering and assembly verification on the Cal. 9552A platform.
Seiko Quartz Cal. 9552A Parts Catalogue
Seiko Quartz Cal. 9552A parts catalogue and service reference for this ultra-compact 23.3 mm movement. Presents exploded views and illustrated component breakdowns with factory part numbers for every jeweled assembly, gear train, and stepping motor element. Technical specifications include the 32.768 Hz quartz oscillator, 7-jewel configuration, 2-pole step motor with rotary step switch regulation, calendar function, and battery life indicator. Train wheel settings and positioning data appear throughout. Battery section addresses both Maxell SR916SW and Seiko TR916SW equivalents with detailed operational notes. The remarks section provides critical holding ring specifications, date dial variations across production runs, precise tube positioning for train wheel bridge assembly, and battery-specific guidance for service technicians. Essential reference for anyone rebuilding, repairing, or sourcing replacement parts for this movement.
Seiko Quartz Cal. 9721A Parts List
Seiko Quartz Cal. 9721A parts list with detailed illustrated component breakdown and part numbers. Features exploded views of the complete movement assembly, essential for identifying individual components, ordering replacements, or performing maintenance on this quartz mechanism. Includes systematic identification numbering for every part in the Cal. 9721A caliber.
Seiko Quartz Cal. 9723A Parts List and Technical Data
Parts list and technical data for the Seiko Quartz caliber 9723A, a compact 26.0 mm diameter movement. This repair and service manual provides exploded views and component diagrams with full part numbers, enabling technicians and watchmakers to source replacement parts accurately. Technical specifications cover the 32 mm overall height (without battery), 2-jewel construction, and 32,768 Hz oscillator frequency characteristic of quartz regulation. The manual details the day/date calendar mechanism and includes critical assembly notes for the fourth wheel, stem lever, day star dial, and date dial configurations. Battery compatibility information specifies compatible cells—Maxell SR1130SW, Seiko SR1130SW, and Seiko SB-AU—along with holding ring selection guidance to ensure proper fit and function. An essential workshop reference for service, repair, and parts identification of this popular Seiko movement.
Seiko Quartz Cal. 9726A Parts Catalog
Service and technical reference for Seiko Quartz movement Cal. 9726A, a compact 26.0 x 23.7 mm caliber standing 3.8 mm tall without battery. This parts catalog and repair guide delivers exploded views of all major assemblies, a complete parts list with factory part numbers, and the technical specifications needed for accurate diagnosis and adjustment work. Coverage includes jewel count (2), oscillator frequency (32.768 Hz), time differential adjustment procedures, battery selection and performance data, and step-by-step checking and calibration methods to verify timekeeping accuracy. Essential reference for technicians servicing or restoring Seiko quartz watches with this movement.
Seiko Quartz Cal. 9923A Parts List
Comprehensive parts list and exploded-view diagrams for the Seiko Quartz Cal. 9923A movement. This detailed reference covers all internal components with numbered identification, including the movement assembly, gear train, calendar mechanism, circuit block, coil block, and supporting hardware. Essential for technicians performing service, repair, or restoration work on this caliber. Includes clear visual breakdowns of component relationships and positioning within the assembly structure.
Seiko Quartz Cal. H239A - Parts List
Seiko Quartz Cal. H239A parts list — a comprehensive illustrated catalog with numbered component identification for the case assembly, movement, circuit board, display panel, and mechanical elements. An essential reference for technicians, hobbyists, and service centers to source exact replacement parts and understand movement architecture.
Seiko Quartz Cal. H249A Parts List
Comprehensive parts list for the Seiko Quartz caliber H249A movement. Features detailed exploded views of all internal components with complete part numbering and technical assembly diagrams. Essential reference for watchmakers and technicians performing maintenance, repair, or restoration work on H249A movements. Includes precise identification of each component and its position within the movement architecture.
Seiko Quartz Cal. H357A Parts List
Comprehensive parts list for the Seiko Quartz Cal. H357A movement, featuring detailed component diagrams with precise part numbers for every movement element and assembly. This technical reference documents the complete mechanical and electronic architecture of the caliber, essential for watchmakers performing repair, maintenance, or parts replacement. Includes systematic identification of all individual movement parts, jewels, springs, and structural assemblies with their corresponding manufacturer reference numbers.
Seiko Quartz Cal. H448A Parts Catalogue
Parts catalogue for the Seiko Quartz Cal. H448A movement. Features exploded view diagrams showing the complete watch mechanism assembly and a comprehensive numbered parts list covering the casing, gear train wheels and pinions, circuit block assembly, battery connections, jewels, fastening screws, LCD panel frame, and all other internal components. Includes assembly notes documenting component variations and substitutions, making this an essential reference for technicians performing repairs, servicing, or complete overhauls of H448A-equipped watches.
Seiko Quartz Cal. H556A Parts Catalogue
Complete parts catalogue for the Seiko Quartz Cal. H556A movement. Features a detailed illustrated parts diagram with component layout and a comprehensive parts list including full part numbers and designations for every component. Essential reference for watchmakers, service technicians, and repair specialists working with this specific quartz caliber. Includes all necessary information for parts identification, ordering, and movement servicing.
Seiko Quartz Cal. H557A Parts Catalogue
Seiko Quartz Cal. H557A Parts Catalogue – complete technical reference for this digital quartz movement. Features detailed exploded diagrams of the full assembly with numbered component callouts, allowing technicians to identify every part with precision. Includes comprehensive parts list covering wheel bridges, jewels, coils, blocks, rotors, and all electronic components. Specifications section details movement characteristics, while notes address liquid crystal display panel color matching requirements and battery type/voltage specifications – essential information for accurate service and replacement work.
Seiko Quartz Cal. H558A Parts Catalogue
Parts catalogue for the Seiko Quartz Cal. H558A movement. This service manual presents exploded views and technical diagrams covering all movement components—dial, hands, wheels, circuit blocks, and electronic parts—essential for understanding the mechanical and electrical architecture of this caliber. The parts list provides numbered references matched to detailed assembly diagrams, making identification and sourcing of individual components straightforward. Includes schematics of removable parts and subassemblies, useful for technicians performing maintenance, repair, or restoration work on H558A-equipped watches. A reference document for watchmakers and service professionals needing precise part information and assembly relationships.
Seiko Quartz Cal.16A Parts List
Parts list for the Seiko Quartz Caliber 16A movement, a 5-jewel quartz watch mechanism with detailed technical specifications. Specifies casing dimensions of 15.15 × 13.00 mm with maximum height of 3.95 mm, operating frequency of 32,768 Hz, and a 2-pole step motor system with trimmer condenser regulation for precise timekeeping. The manual provides an illustrated breakdown of all component parts with individual reference numbers and style designations, essential for service technicians, watchmakers, and repair specialists performing maintenance or parts identification on this caliber.
Seiko Quartz Cal.2B21A Parts List
Parts catalogue for the Seiko Quartz Cal.2B21A movement, essential for watchmakers and technicians working with this quartz caliber. Features exploded diagrams showing the precise layout of every component, paired with detailed part numbering for accurate identification and sourcing during repair, maintenance, or restoration work. Covers the complete Cal.2B21A assembly from barrel to escapement, making it indispensable for anyone servicing watches fitted with this movement. Use this parts list alongside a full service manual or repair manual to locate exact replacement components by their factory part numbers.
Seiko Quartz Cal.3823A Parts List
Seiko Quartz Cal.3823A parts list with exploded diagrams and component nomenclature. This comprehensive technical reference details every serviceable element of the 7-jewel 3823A quartz movement, including part numbers and assembly relationships. The 3823A operates at 16,384Hz and incorporates calendar functionality with instant day and date adjustment, a continuously sweeping second hand, precision micro-adjusting device for chronometric regulation, and integrated temperature compensation circuitry. Essential for technicians performing movement servicing, parts replacement, or assembling repair kits for this popular mid-range Seiko quartz caliber.
Seiko Quartz Cal.4110A Parts List
Seiko Quartz Cal. 4110A parts list and assembly diagrams for service technicians and watch repair professionals. This movement parts manual covers the 2-jewel Seiko quartz caliber, featuring a 32,768 Hz quartz crystal oscillator, step-motor driving system, and trimmer capacitor regulation circuitry. Complete component identification with factory part numbers and detailed exploded views of the movement assembly—essential for ordering replacement parts, performing module-level repairs, and understanding the mechanical and electrical architecture of this compact quartz platform.
Seiko Quartz Cal.4110B Parts List
Seiko Quartz Cal.4110B Parts List with complete illustrated exploded diagram for this 3-jewel quartz movement. Essential reference for watchmakers and technicians servicing or assembling this caliber. Covers physical specifications—19.4 mm diameter, 3.8 mm height—along with the 32.768 Hz oscillator frequency and step motor driving architecture. Details the trimmer capacitor adjustment system for frequency regulation. Includes comprehensive parts identification with factory reference numbers and assembly variation combinations for hour wheel, cannon pinion, and center wheel configurations. Indispensable technical documentation for disassembly, inspection, and parts sourcing.
Seiko Quartz Cal.4302A Parts List
Seiko Quartz caliber 4302A parts list and exploded diagram covering the complete movement specification. The 2-jewel movement oscillates at 32,768 Hz and employs a step motor driven by trimmer condenser regulation. Watch case dimensions are 18.00 mm diameter × 4.11 mm maximum height. Includes full parts nomenclature with reference numbers and assembly details for accurate service and repair.
Seiko Quartz Cal.4303A Parts List
Parts list and exploded views for the Seiko Quartz caliber 4303A movement, a 2-jewel step motor quartz watch with calendar and date functions. This technical document provides numbered part references, component names, and detailed illustrations essential for watchmakers and repair technicians. Specifications include an 18.00mm case diameter, 32.768 Hz crystal frequency, and a trimmer capacitor regulation system with second-setting device. Use this parts list as a reference guide when ordering replacement components, performing maintenance, or conducting repairs on this caliber.
Seiko Quartz Cal.4312A Parts List
Comprehensive parts list and exploded diagrams for the Seiko Quartz caliber 4312A quartz movement (2 jewels). This detailed repair manual supplement provides numbered component references, part identification, and assembly guidance essential for servicing this 32,768 Hz quartz mechanism with step motor drive system. Covers all internal components and their relationships within the movement structure, making it an indispensable technical reference for watchmakers performing maintenance, repair, or complete overhauls on this caliber.
Seiko Quartz Cal.43A Parts List and Technical Data
Seiko Quartz Cal.43A parts list and technical data sheet covering the 2-jewel movement. This repair manual provides detailed component illustrations with individual part numbers, movement specifications including 18.00 mm casing diameter, 3.58 mm height, 32.768 Hz frequency, and 2-pole step motor system. Assembly diagrams clarify positioning of holding rings, setting levers, and battery connection options. Essential reference for watch technicians servicing or maintaining this compact quartz movement.
Seiko Quartz Cal.47A Parts List and Technical Data
Comprehensive parts list and technical data for the Seiko Quartz Cal.47A movement. This service manual contains detailed component diagrams with factory reference numbers and full specifications for this compact quartz caliber, including case diameter of Ø 15.3 mm, maximum height of 3.8 mm, 32,768 Hz crystal oscillator frequency, and 2-pole step motor system. The documentation covers the 7-jewel movement architecture, trimmer capacitor regulation specifications, and illustrated component layouts essential for accurate identification, assembly, and maintenance work. Ideal for watchmakers and technicians performing repair, servicing, or restoration on Seiko quartz timepieces fitted with this caliber.
Seiko Quartz Cal.4826A Solar Powered Watch Parts List
Seiko Quartz Cal.4826A Solar-Powered Watch Parts List and Component Reference. This service manual provides detailed diagrams and genuine part numbers for complete movement disassembly and repair of this solar quartz timepiece. Covers the step motor system, electronic circuit board elements, jewel specifications (7 total), calendar mechanism components, and all mechanical assemblies needed for accurate reassembly. An essential workshop reference for technicians servicing Seiko solar-powered quartz movements.
Seiko Quartz Cal.6423A/6429A Technical Service Guide
Comprehensive technical service manual for Seiko Quartz caliber 6423A and 6429A movements. This workshop guide covers complete specifications and circuit block architecture, detailed disassembly and reassembly procedures with proper lubrication protocols, calendar mechanism operation, gear train and circuit block schematics, and the full setting mechanism. Includes extensive checking and adjustment procedures for output signal verification, battery voltage and conductivity testing, coil block performance, reset conditions and train wheel calibration, gear train mechanics, timekeeping accuracy, current consumption analysis, water resistance verification, and cosmetic inspection standards. An essential reference for service technicians working on these reliable quartz calibers.
Seiko Quartz Cal.7810A Parts List
Comprehensive parts list and exploded diagrams for the Seiko Quartz Cal.7810A movement, a 5-jewel quartz caliber built into compact 23.3mm cases. This repair manual details every component by part number and nomenclature: gear train wheels and pinions, bridge and lever assemblies, hairsprings, the circuit block and coil block assemblies, step rotor mechanism, dial washer, case clamp, fasteners, jewel settings, and silver oxide battery specification. The movement runs on a 32,768 Hz quartz crystal oscillator with a 2-pole step motor system and trimmer condenser fine-tuning circuit. Essential reference for watch technicians performing maintenance, adjustment, or component replacement on this long-production caliber found across Seiko's dress and sports watch ranges.
Seiko Quartz Cal.78A Parts List
Complete parts list for the Seiko Quartz caliber 78A movement, a compact 5-jewel quartz mechanism measuring 23.3 mm in diameter with a maximum height of 2.9 mm. This service manual includes detailed exploded views of the movement assembly, individual component photographs for precise identification, and full part numbers for every mechanical and electrical element. The Cal. 78A uses a 32,768 Hz quartz crystal oscillator paired with a 2-pole step motor system and features a trimmer capacitor regulation circuit for frequency adjustment. An essential workshop reference for anyone servicing or rebuilding these movements, whether for repair, restoration, or parts sourcing.
Seiko Quartz Caliber 7813A Parts List
Illustrated parts list for the Seiko Quartz caliber 7813A movement. This comprehensive visual catalog identifies every component with its corresponding part number, making it an essential reference for technicians servicing or repairing this quartz movement. Includes detailed diagrams showing component placement and assembly relationships within the movement.
Seiko Quartz Calibre 43A & 4303A Technical Guide
Complete service manual for Seiko Quartz Calibre 43A and 4303A movements. This technical guide covers full specifications for both calibers, detailed disassembly and reassembly procedures essential for accurate repair work, lubrication guidelines specific to quartz and mechanical components, cleaning methods that preserve electronic integrity, calendar mechanism operation and adjustment, and setting mechanism calibration. Includes comprehensive checking and adjustment protocols with diagnostic flowcharts to identify and resolve common issues. An indispensable workshop reference for technicians servicing these widely used Seiko quartz calibers.
Seiko Quartz H249A H259A Technical Guide
Technical service manual for Seiko Quartz caliber H249A and H259A movements. Covers specifications, circuit block architecture, and movement characteristics including the 2-jewel escapement and FEM display system with nematic liquid crystal technology. Details electronic crown switching and automatic electronic hand-setting functions. Includes comprehensive checking and adjustment procedures: battery voltage and conductivity testing, output signal verification, liquid crystal panel and coil block testing, current consumption measurement, speaker block assessment, switch component conductivity checks, accuracy verification, and functional adjustments. Features detailed technical diagrams of movement structure and circuit components for precise repair and maintenance.
Seiko Quartz H556A H557A Technical Guide
Comprehensive technical guide for servicing Seiko Quartz caliber H556A and H557A movements. This workshop manual covers complete specifications and circuit block architecture, detailed disassembly and reassembly procedures with proper lubrication protocols, movement module maintenance routines, liquid crystal panel electrode specifications, and systematic checking and adjustment methods. Essential reference for watch technicians working with these precision quartz calibers.
Seiko Quartz LC Cal. 0662A Parts List
Comprehensive parts list for the Seiko Quartz LC Cal. 0662A digital watch movement. This document provides all component part numbers and technical specifications essential for service and repair, including jewel count (0), case diameter 27.0 mm, height 7.60 mm, and operating frequency 32,768 Hz. Detailed technical illustrations accompany each movement component with corresponding reference numbers, making this resource indispensable for watchmakers performing maintenance, troubleshooting, or parts replacement on this classic Seiko quartz caliber.
Seiko Quartz LC Cal.0124A Parts List and Technical Data
Technical parts list and service data for the Seiko Quartz LC Cal.0124A digital watch movement. Covers complete caliber specifications including 28.00mm case diameter, 32.768 Hz quartz crystal oscillator, and functional overview of the digital display system. Includes detailed component illustrations with reference designations throughout the movement, plus screw specifications for reassembly and maintenance. Essential reference for technicians servicing or rebuilding this quartz movement.
Seiko Quartz LC Cal.0139A Parts List
Seiko Quartz LC caliber 0139A parts list and reference guide for this dual-zone timer quartz watch movement. Complete technical documentation with detailed part drawings and factory part numbers covering the entire assembly—case components, LCD panel module, movement mechanism, and watch accessories. Essential for repair technicians and watchmakers servicing this model. Specifications: case diameter Ø29.20 mm, case height 11.5 mm, quartz frequency 32.768 kHz, 0 jewels movement. This parts list serves as a comprehensive reference for identifying correct replacement components and understanding assembly sequence.
Seiko Quartz LC Cal.0439A Parts List
Seiko Quartz LC Cal.0439A parts list and technical specifications for the digital watch movement. This comprehensive parts catalog provides detailed caliber documentation with component illustrations, full part numbering, and complete watch specifications including 27.0 mm case diameter, 5.5 mm maximum height, and 32.768 Hz crystal oscillator frequency. Covers the digital display assembly with illuminating backlight, calendar module displaying month and date windows, and single-crystal LCD screen configuration. Essential reference for identifying and sourcing individual components, understanding movement architecture, and performing component-level maintenance or repair on this classic Seiko quartz caliber.
Seiko Quartz LC Cal.0532A Parts List
Parts list for the Seiko Digital Quartz LC Cal.0532A, covering all internal components and assemblies with technical specifications (case diameter 27.80 mm, height 6.86 mm, 32.768 Hz quartz oscillator frequency). Features detailed component diagrams with part references and numbered illustrations for service, repair, and maintenance. Includes specifications for the digital display system with hour, minute, second, and calendar functions. An essential technical reference for watchmakers and technicians performing disassembly, parts identification, and reassembly of this quartz movement.
Seiko Quartz LC Cal.0674A Parts List
Seiko Quartz LC caliber 0674A parts list and movement specifications. This comprehensive parts reference covers the 27.0 mm diameter, 8.5 mm height liquid crystal display movement with 32.768 kHz quartz crystal frequency and jeweled escapement. Includes detailed component identification with part numbers and visual illustrations for every assembly element. Digital display specifications cover hour, AM/PM indicator, and calendar functions. Essential for technicians performing service, repair, or complete movement reconstruction on this compact LCD quartz caliber. The parts list cross-references each component to its position within the movement, streamlining component sourcing and assembly during workshop maintenance or restoration.
Seiko Quartz LC Cal.A031A Parts List
Seiko Quartz LC Cal.A031A parts list and repair manual covering the complete component breakdown for this LCD alarm watch. Includes exploded diagrams with factory part numbers for every internal assembly—movement, case, display module, and battery housing. Essential reference for technicians servicing or rebuilding this model. Specifications: 0 jewels, 32.768 Hz quartz crystal frequency, case diameter 22.40 mm, case height 8.75 mm. Watch features numeric LCD display with dual-function alarm, calendar and date subdisplay, precision time adjustment via micro-adjuster mechanism, and battery depletion indicator. Detailed parts identification ensures accurate component sourcing and correct reassembly during maintenance or repair work.
Seiko Quartz LC Cal.M158A World Timer Parts List
Comprehensive parts list for the Seiko Quartz LC caliber M158A world timer watch. This technical reference provides detailed component identification, exploded parts diagrams, and specifications for the 27.0 mm case diameter movement, covering all internal assemblies including the digital display system and the 24-hour world time mechanism spanning 29 time zones. Essential documentation for technicians performing maintenance, repair, or complete overhaul of this model, with accurate part numbers and assembly relationships clearly illustrated throughout.
Seiko Quartz LC Chronograph Cal.0634A Parts List
Seiko Quartz LC Chronograph Cal.0634A Parts List — Complete component breakdown and part numbering for this 27.00 mm LCD chronograph movement. This parts list provides detailed diagrams and original Seiko part numbers covering the full watch assembly: case, movement mechanism, display module, circuit block, quartz crystal oscillator, and all accessory components. Essential reference for repair technicians, watchmakers, and parts sourcing for this specific caliber.
Seiko Quartz LC Chronograph Cal.0634B Parts List
Parts list for the Seiko Quartz LC Chronograph Cal.0634B—an essential component reference for servicing or restoring this classic quartz chronograph. The manual provides precise part numbers and assembly data for all internal elements, including the setting lever, circuit block, liquid crystal display panel, battery, bulb, springs, and mechanical components. Specifications: 0 jewels, 27.00 mm case diameter, 32.760 Hz quartz oscillator. Use this catalog to identify replacement components, understand the movement's construction, and perform accurate repairs or routine maintenance.
Seiko Quartz LC Digital Watch Cal.0624A Parts List
Parts list for the Seiko Quartz LC digital watch, caliber 0624A. Provides complete component identification with part numbers, detailed specifications for the case and movement (23.6 mm diameter, 8.50 mm maximum height, 32.768 Hz quartz frequency), liquid crystal display characteristics, and technical diagrams showing all watch components and their assembly. Essential reference for service technicians and watchmakers performing maintenance, repair, or parts replacement on this model.
Seiko Quartz LC M154A Perpetual Calendar Watch Parts List
Complete parts list and specifications for the Seiko Quartz LC M154A perpetual calendar digital watch. This reference document provides detailed technical data including case dimensions (27.0 mm diameter, 9.1 mm maximum height) and the 32.768 Hz crystal oscillator frequency that drives the movement. The illustrated catalog presents all replacement components with their corresponding part numbers, essential for identifying and sourcing components for movement assembly and case construction. Valuable resource for watchmakers, service technicians, and collectors maintaining or restoring this model.
Seiko Quartz Technical Guide Cal. 6430, 6431, 6432, 6433, 6439
Seiko quartz technical service manual covering Cal. 6430, 6431, 6432, 6433, and 6439 movements. This workshop reference includes a detailed specifications table that compares core features across all five calibers—time display, date and day-of-week functions, electronic reset switch capability, and battery life indicator performance. The guide walks through complete disassembly and reassembly sequences with precision mechanical diagrams showing the calendar mechanism and gear train layout, ensuring technicians can strip and rebuild these movements methodically. Lubrication procedures specify Moebius A oil and Seiko watch oil applications at critical points. A comprehensive screw inventory lists every fastener by part number for accurate ordering and replacement. Checking and adjustment sections cover output signal verification, battery voltage testing, coil block conductivity measurement, gear train mechanism function checks, and accuracy validation under test conditions. Essential reference for service centers and independent watchmakers working on these popular quartz calibers.
Seiko S022A Digital Quartz Parts List
Seiko Cal. S022A digital quartz movement parts list with exploded view diagrams showing the complete internal assembly. Covers all major functional modules including the circuit block, battery spring, battery terminals, switch cock, connector block, battery guard, liquid crystal panel frame, switch lever, liquid crystal display panel, and module fastening hardware. Essential reference for technicians performing disassembly, maintenance, or component replacement on this movement. Includes detailed part identification and positioning for accurate reassembly.
Seiko S031A Parts Catalogue and Technical Guide
Complete parts catalogue and technical guide for the Seiko S031A digital stopwatch. This workshop manual covers all aspects of service and repair, from initial disassembly through final reassembly. Includes detailed specifications for every component, a comprehensive parts list with numbered illustrations showing exact location and orientation of each piece, and step-by-step reassembly procedures. Features lubrication points and application guidelines, battery installation instructions with correct orientation diagrams, and circuit block structure documentation to aid in troubleshooting. Value checking procedures help verify calibration and timing accuracy, while internal component diagrams and assembly guidelines support technicians in understanding the movement's architecture and performing accurate repairs or routine maintenance.
Seiko S033A Stopwatch Parts Catalogue and Technical Guide
Seiko S033A stopwatch parts catalogue and technical guide covering complete specifications, disassembly and reassembly procedures, and circuit block structure. Includes battery installation instructions, electroluminescent panel troubleshooting, component identification with part numbers, lubrication specifications, and value checking procedures for time accuracy and current consumption. This workshop manual serves as an essential reference for service technicians performing maintenance and repairs on the S033A model.
Seiko S034A Stopwatch Parts Catalogue and Technical Guide
Comprehensive parts catalogue and technical service manual for the Seiko S034A digital stopwatch module. This workshop reference includes a complete numbered parts list, detailed disassembly and reassembly procedures, circuit block diagram, battery installation instructions, and step-by-step piezoelectric element replacement guidance. The manual covers essential maintenance topics including lubrication specifications and systematic value checking procedures for verifying time accuracy, upconverter coil resistance, and current consumption characteristics. Specifications detail a multiplex LCD display stopwatch with lap time and split time measurement, 30-set memory recall capacity, alarm functionality, integrated time and calendar display, and automatic calendar spanning 1995 to 2044.
Seiko S038A Parts Catalogue and Technical Specifications
Parts catalogue and technical specifications for the Seiko S038A digital sports watch. This comprehensive reference provides complete technical data including case dimensions (69.5mm outside diameter, 18.9mm height), display specifications, and multiplex LCD driving system with Nematic Liquid Crystal FEM display technology. Details all functional features: dual timer display with main timer and two sub-timers, dual-team score display with score memory recall, stopwatch with lap timing capability, and time/calendar display featuring automatic calendar programming from 1993 to 2042. Additional specifications cover 12/24-hour time format selection, battery life indicator, and audible confirmation signals. The watch operates on a CR2032 battery (3.0V) with approximately three years typical runtime. Accuracy rated at ±0.0012% across the normal temperature range. Essential resource for service technicians and parts identification.
Seiko S120A S123A Parts Catalogue/Technical Guide
Seiko S120A and S123A stopwatch module parts catalogue and technical guide. Covers complete module specifications, dimensions, and Nematic Liquid Crystal display technology with 1/4 multiplex driving system. Details stopwatch functionality up to 10 hours with split and lap time recording, elapsed time tracking, and integrated time/calendar display. Includes battery specifications for SEIKO CR2032 and Maxell CR2032 cells (3.0V, approximately 5 years operational life). Features step-by-step disassembly and reassembly procedures with comprehensive parts diagrams and individual component identification for service and maintenance work.
Seiko S240A Service Manual - Parts Catalogue and Technical Guide
Complete service manual and parts catalogue for the Seiko S240A digital watch module. This technical guide covers the full 32.0mm diameter, 6.8mm height module with nematic liquid crystal display driven by FEM and multiplex systems. Includes comprehensive parts list with manufacturer part numbers, exploded assembly diagrams for reference during disassembly and reassembly, detailed component identification, and step-by-step procedures for service work. Specifies Matsushita CR2025 3.0V battery. An essential workshop manual for anyone servicing or repairing this module.
Seiko S351A Parts Catalogue and Technical Guide
Parts catalogue and technical guide for the Seiko S351A digital stopwatch. This service manual provides the specifications needed for maintenance and repair, including module dimensions (112.0 mm outside diameter, 22.6 mm height), display technology (Nematic Liquid Crystal FEM), and a complete exploded view with all numbered components clearly identified. The workshop manual covers assembly and disassembly procedures in detail, specifies lubrication instructions with oil types for each application, walks you through CR2032 battery installation, and explains the circuit block structure so you understand how the movement functions. An essential troubleshooting and reference resource for anyone servicing this model.
Seiko S701A Parts Catalogue and Technical Guide
Complete parts catalogue and technical guide for the Seiko Cal. S701A quartz movement. This repair manual provides a comprehensive component breakdown with numbered parts diagrams and detailed specifications for the TN-type liquid crystal display, 1/4 multiplex driving system, and physical dimensions (46.0 mm outside diameter, 27.0 mm height). The service documentation includes step-by-step disassembly and reassembly procedures with clear illustrations, CR2032 battery installation instructions, and power requirements for stopwatch and illumination operation. The guide covers all functional features including time and calendar display, stopwatch with lap and split-time measurement capability, memory storage for up to 100 measurements, LED illumination, and power-saving mode. Essential reference for watch technicians performing maintenance, battery replacement, or module servicing.
Seiko S800A Dive Computer - Parts Catalogue & Technical Guide
Parts catalogue and technical guide for the Seiko S800A dive computer — a specialized service manual for technicians maintaining and repairing this professional diving instrument. Provides detailed component breakdown with original part numbers, step-by-step disassembly and reassembly procedures, lubrication specifications for critical assemblies, and circuit block structure diagrams. Includes battery installation instructions, troubleshooting procedures for the electroluminescent panel and display issues, and full module specifications covering the nematic liquid crystal display, multiplex driving system, automatic calendar function, scuba chronograph timing, and dive log recording capabilities. Essential reference for authorized service centers and experienced repair technicians working on Seiko dive computers.
Seiko S820A Digital Watch Parts Catalogue & Technical Guide
Parts catalogue and technical guide for the Seiko S820A digital wristwatch, providing complete specifications for the S820A module. The guide covers the Nematic Liquid Crystal display with integrated time and calendar functions, including automatic date sequencing from 1993 to 2042. The module incorporates a temperature graph feature alongside a dual-mode thermometer (manual and automatic measurement from -20°C to +50°C), a chronograph with tachymeter capability displaying up to 10 hours in 1/1000 second resolution, and dual independent alarms. Technical specifications detail module dimensions at 34.3 mm outside diameter and 7.3 mm height, the Multiplex driving system architecture, and battery performance using Matsushita CR2025 cells rated for 2-year service life at 3.0V nominal voltage. Monthly rate accuracy is specified at better than 20 seconds deviation. Additional operational features include selectable sound control, battery depletion indicator, and an illuminating light panel for display readability. This workshop manual serves as an essential reference for service technicians, repair professionals, and parts identification, with complete component breakdowns and assembly details throughout.
Seiko Scuba Cal. 7K52A Parts Catalogue and Technical Guide
Complete parts catalogue and technical guide for the Seiko Scuba diving watch Cal. 7K52A. This service manual delivers detailed movement specifications, exploded diagrams, and a comprehensive numbered parts list covering all mechanical and electronic components. Includes circuit block schematics, battery installation procedures, and reassembly guidance. The 7K52A features an electronic depth gauge, dive timer hand, date window, and circuit reset switch—designed for recreational scuba diving applications. An essential workshop reference for technicians servicing or restoring this model.
Seiko SCUBA Cal. M795A, M796A Parts Catalogue & Technical Guide
Seiko SCUBA Cal. M795A and M796A parts catalogue and technical guide. Contains complete specifications for these recreational diving watches including module dimensions (Ø31.8 mm), display systems, measurable depth ranges (0–130 ft for M795A; 0–40 m for M796A), operating temperature ranges (15°F to 120°F / −10°C to +50°C), and sensor accuracy specifications. Features nematic liquid crystal FEM display with 1/5 multiplex driving system, depth and water temperature displays, atmospheric pressure measurement, dive data recording, and alarm functions. Essential technical reference for authorized repair centers and service technicians working on these vintage SCUBA instrument modules.
Seiko Twin Quartz Cal. 97 Series Service Manual
Seiko Twin Quartz Cal. 97 Series service manual for technicians and watchmakers performing repair, maintenance, and restoration work. This comprehensive workshop manual details the complete mechanical and electronic architecture of the Twin Quartz movement, starting with full specifications: 32,768 Hz crystal oscillator, Ø26.0 mm case diameter, and 2-jewel bearing configuration. The repair guide provides step-by-step disassembly and reassembly procedures illustrated with exploded mechanical diagrams of the calendar mechanism—all 19 numbered components precisely identified to ensure correct order and orientation during service. Lubrication protocols specify exact oil types and application points critical for regulating friction and ensuring long-term timekeeping stability. Time accuracy adjustment procedures walk through the calibration process, supported by comprehensive checking and adjustment tables for step motor regulation and trimmer condenser fine-tuning. The battery section covers silver oxide power cells with approximately 5-year service life at 1.55V nominal voltage, plus installation and polarity guidance. Operating range specifications (-10°C to +60°C) define the environmental limits within which the movement performs to rated tolerance. Essential reference for anyone servicing these precision quartz watches.
Seiko UW01A Digital Quartz Watch Parts Catalogue
Parts catalogue for the Seiko Cal. UW01A digital quartz watch. This comprehensive parts list provides detailed numbered reference illustrations identifying every component and subassembly found in this model, making it essential for technicians performing repairs, maintenance, or restoration work. The structured layout allows quick location of specific parts, whether you're sourcing replacements, verifying assembly sequences, or conducting a complete overhaul. Ideal for watchmakers, service centers, and collectors needing precise parts information for the UW01A.
Seiko V041A Service Manual - Movement Specifications and Repair Procedures
Service manual for Seiko caliber V041A quartz movement, providing complete technical specifications and step-by-step repair procedures for watchmakers and service technicians. Details include precise movement dimensions (24.5mm across the 6–12 o'clock axis, 23.0mm across the 3–9 o'clock axis, 3.9mm height) and casing diameter specifications. Covers both analog three-hand and digital Nematic Liquid Crystal FEM display configurations. Documents the step motor driving system with load-compensated pulse control and electronic circuit reset mechanism. Repair procedures address winding stem removal and installation, hand fitting using the plastic train wheel bridge method, and battery replacement with compatibility notes for SEIKO SR726W, MAXELL SR726W, and SONY SR726W cells (1.55V nominal). Includes current consumption verification (under 2.0µA) and essential post-installation checks. An indispensable workshop manual and parts reference for authorized service centers and experienced watch repair professionals.
Seiko V182A Solar Quartz Watch Parts Catalogue and Technical Guide
Parts catalogue and technical guide for the Seiko V182A solar quartz watch movement. Features detailed component listings with numbered parts and exploded assembly diagrams showing the dial, solar cell unit, holding ring, date dial, winding stem, and circuit blocks. Technical specifications include 20.0 mm outside diameter, 19.0 mm between 3 o'clock and 9 o'clock sides, 2.4 mm height, step motor driving system, solar power system with overcharge prevention and energy depletion forewarning, electronic circuit reset switch, train wheel setting device, date calendar with instant setting capability, 2 jewels, and titanium-lithium ion rechargeable battery. Contains disassembly and reassembly procedure references with parts identification and remarks for component selection based on case design.
Seiko V232A Analogue Quartz Technical Guide and Parts List
Complete technical guide and parts list for the Seiko caliber V232A analogue quartz movement. This workshop manual covers movement specifications, fastener identification, and step-by-step disassembly and reassembly procedures with detailed lubrication instructions. Includes comprehensive checking and adjustment methods for output signal verification, battery voltage testing, and coil block calibration. Features annotated exploded diagrams showing all movement components and detailed cross-sectional views of the gear train to aid in understanding mechanical relationships and proper reassembly sequence. Essential reference for service technicians working with this quartz caliber.
Seiko V247A V248A Quartz Watch Technical Guide Parts List
Technical service manual and comprehensive parts list for Seiko V247A and V248A quartz watch movements. Covers complete specifications, step-by-step disassembly and reassembly procedures with detailed lubrication guidance, checking and adjustment protocols, circuit block architecture, and a full parts catalog with technical schematics and component illustrations. Essential reference for watchmakers and technicians servicing these analogue quartz calibers.
Seiko V338A Parts Catalogue and Technical Guide
Seiko V338A quartz movement parts catalogue and technical service guide. This workshop manual provides technicians and hobbyists with complete specifications and exploded diagrams for all internal components of the Cal. V338A movement. The parts list uses numbered reference diagrams for precise component identification, covering the main plate, balance wheel assembly, and electronic switching circuits. Includes detailed winding stem specifications, date dial configuration options, and critical performance parameters such as coil block resistance values and current consumption thresholds needed for accurate movement testing and troubleshooting. Essential reference for repair, maintenance, and parts sourcing.
Seiko V400A V401A Parts Catalogue and Technical Guide
Parts catalogue and technical guide for Seiko quartz movements Cal. V400A and Cal. V401A. Covers complete specifications, detailed parts diagrams with numbered components, step-by-step disassembly and reassembly procedures, circuit block architecture, installation guidance for hands and battery connections, train wheel bridge adjustment data, and value checking protocols for coil block resistance and current consumption measurements. This workshop manual provides technicians and experienced watchmakers the reference material needed for service, repair, and accurate calibration of these quartz movements.
Seiko V50 Series Service Manual - Cal. V50A V501A
Service manual for Seiko V50 series quartz watch movements (V50A and V501A calibers). This workshop manual provides complete technical specifications for these compact stepping-motor driven movements, including physical dimensions (Ø 15.3mm–18.2mm, height 2.99mm), time display configurations with 2 or 3 hands, electronic circuit reset functionality, and battery specifications (1.56V nominal, approximately 2-year service life). The repair guide covers essential after-sales servicing procedures: winding stem removal and reinstallation techniques, hand setting on the fourth wheel, and current consumption measurement using the Seiko Digital Multi-Tester S-840A. Detailed sections address the zero-jewel movement construction, heat-treated movement components specific to Seiko's after-sales servicing system, and proper electrical circuit diagnostics. An indispensable parts list and maintenance reference for service technicians working with these reliable quartz calibers.
Seiko V653B Quartz Chronograph Movement Parts Catalogue and Technical Guide
Complete parts catalogue and technical guide for the Seiko V653B quartz chronograph movement, an essential reference for watchmakers and repair technicians. This workshop manual covers the entire V653B platform with detailed specifications (Ø29.5 mm, height 3.7 mm) and walks through every stage of movement service. The guide includes step-by-step disassembly and reassembly procedures, comprehensive parts identification with factory part codes, precise setting positions for wheels and bridges, battery installation instructions for the Seiko SR920SW cell with circuit reset protocols, and proven techniques for dial and hand removal and reinstallation. Lubrication guidelines ensure proper function of the chronograph mechanism. Exploded views and assembly diagrams clearly show the chronograph hand assembly, 24-hour hand configuration, date calendar mechanism, and the step motor driving system that controls chronograph and calendar functions. An indispensable troubleshooting and maintenance reference for any technician working with this movement.
Seiko V657A Quartz Chronograph Movement Parts Catalogue and Technical Guide
Seiko V657A quartz chronograph movement parts catalogue and technical service guide covering complete specifications—29.5 mm case diameter, 3.7 mm height, 0 jewels—with exploded diagrams of the full movement assembly. The manual includes a detailed parts list organized by reference number, step-by-step disassembly and reassembly procedures, and battery specifications for SR920SW, SR920PSW, Sony SR920SV, and Evereday 371 variants. Technical sections cover the electronic circuit block architecture, the three-piece step motor system driving chronograph operation, date calendar mechanism and adjustment, train wheel bridge calibration, and precision performance parameters. Essential for watch repair professionals servicing Seiko chronograph movements.
Seiko V691A Watch Parts Catalogue and Technical Guide
Seiko V691A quartz watch movement parts catalogue and technical service guide covering everything needed for professional repair and maintenance of this 24.0mm diameter movement. Features detailed exploded diagrams of all internal components with precise technical specifications and measurements. Includes step-by-step assembly and disassembly procedures, installation guidance for dial, hands, mode indicator, battery clamp, winding stem, and circuit block assembly. Covers lubrication points and specifications critical for reliable timekeeping. Circuit block structure diagrams help technicians understand the electrical architecture and troubleshoot common issues. Comprehensive component value checking procedures and diagnostic guidelines support efficient fault identification. Specifies battery requirements: SEIKO SR920W or Maxell SR920W, 1.55V. An essential workshop manual for watchmakers and repair technicians working with V691A movements.
Seiko V694A Alarm Chronograph Watch Parts Catalogue and Technical Guide
Service manual and parts catalogue for the Seiko V694A alarm chronograph watch movement, providing comprehensive technical specifications and repair guidance. Details the quartz movement architecture including 24.6mm diameter and 2.6mm height, step motor drive system with electronic reset circuitry, and 4-jewel configuration. Covers the 12-hour alarm mechanism with full functional description, trimmer condenser adjustment procedures, and battery specifications (SEIKO SR920W, 1.55V, typical service life approximately 2.5 years). Features numbered exploded diagrams identifying every movement component, lubrication points and recommended compounds, and complete parts reference listings with manufacturer numbers. Essential for technicians performing maintenance, troubleshooting, or component replacement on this popular Seiko quartz alarm chronograph.
Seiko V707A Movement Service Guide
Service manual for the Seiko Cal. V707A quartz watch movement, providing comprehensive technical specifications and repair guidance for watchmakers and service technicians. Details movement dimensions, casing diameter, height, time indication system, and stepper motor driving mechanism. Includes battery type and expected service life data. Features a discrimination table essential for precise hand height installation aligned with dial numerals, complemented by detailed movement diagrams showing internal architecture. Documents the circuit block structure with Part No. 4000 B11, covering resistance and current consumption parameters for the coil block, enabling accurate value verification during servicing. Contains practical after-sales servicing procedures and reference data needed for professional watch movement maintenance and troubleshooting.
Seiko V707C/V708C Technical Data
Technical specifications and service data for Seiko quartz watch movements Cal. V707C and V708C. This technical reference includes complete dimensional specifications (18.5 mm diameter, 2.9 mm height), hand installation height discrimination table for precise assembly, battery connection remarks for safe installation, and the circuit block structure diagram (Part No. 4000-633). Contains all critical value-checking parameters including coil block resistance range (0.90 KΩ – 1.30 KΩ) and current consumption limits (less than 1.40 µA for the complete movement, less than 0.28 µA for the circuit block alone). Features a step motor type caliber with 0 jewels and nil regulation system. Essential reference for technicians servicing or assembling these Seiko quartz movements.
Seiko V802A Watch Movement Parts Catalogue and Technical Guide
Seiko V802A quartz watch movement parts catalogue and technical service guide. This comprehensive workshop manual supplies everything needed for professional repair and maintenance of this compact movement. Detailed parts list with numbered diagram references enables precise identification of every component. Movement specifications include 18.4mm outside diameter and 2.55mm height, powered by a step motor driving system. Disassembly and reassembly procedures walk through each stage with clarity, complemented by explicit winding stem removal instructions. The guide covers train wheel bridge settings for accurate reassembly, coil block resistance values critical for electrical troubleshooting, and current consumption data for power management diagnostics. Electrical circuit block structure is fully documented, with remarks on correct component assembly to prevent malfunction. Battery specifications (1.55V) ensure proper power source selection. An essential reference for watchmakers and technicians servicing Seiko quartz movements.
Seiko W307A Service Guide - Technical Data
Complete service manual for the Seiko W307A digital watch module, covering full technical specifications and repair procedures. The W307A features a compact 27.4mm diameter case with 4.8mm height, nematic liquid crystal FEM display, and multiplex driving system. Display modes include 12-hour and 24-hour time/calendar functions, 20-second alarm, and stopwatch capability up to 60 minutes with integrated time and calendar setting controls. The module incorporates an alarm test system, hourly time signal, automatic return mechanism, full automatic calendar function, and pattern segment checking for display verification. Powered by a CR2016 lithium battery rated for 7 years of service life at 3.0V. This workshop manual covers system reset procedures essential for calibration and maintenance, current consumption measurement protocols using the Seiko Digital Multi Tester S-840A with Multi Adaptor MA-40A, and comprehensive technical data necessary for accurate diagnostics and repair work. An indispensable reference for watch technicians servicing this model.
Seiko W339A Parts Catalogue and Technical Guide
Seiko W339A parts catalogue and technical guide covering complete specifications and component breakdown for this digital watch model. The documentation provides detailed exploded-view diagrams of all internal components including insulators, battery, circuit block cover, circuit block, buzzer lead terminal, battery connector, liquid crystal panel, reflecting mirror, and liquid crystal panel frame. Each part includes reference numbers and essential remarks on proper battery installation procedures. Step-by-step disassembling and reassembling instructions guide technicians through safe component removal and restoration. Value checking specifications ensure proper function verification after service. The W339A features a 1/3 multiplex LCD display system delivering time and calendar information alongside stopwatch, timer, alarm, and dual time functions. Essential reference for anyone performing maintenance, repair, or component replacement on this model.
Seiko W358A Parts Catalogue and Technical Guide
Parts catalogue and technical guide for the Seiko W358A digital watch module, providing complete documentation for service technicians and repair professionals. Contains a detailed parts diagram with numbered components including case back screw, case back, gasket, module assembly, case middle, buttons and springs, along with disassembly and reassembly procedure illustrations for efficient maintenance work. Features liquid crystal panel options with multiple variants to match production specifications. The circuit block structure diagram clearly identifies all capacitors, transistors, and converter components for circuit-level troubleshooting. Battery specifications detail both Seiko CR2025 and Matsushita CR2025 options, each rated at 3.0V nominal voltage with approximately 3 years typical service life. Module specifications cover the Nematic Liquid Crystal display with 1/4 multiplex driving system and full operational capabilities including time and calendar display, alarm setting, dual time zone, timer, circuit race timer, memory recall, and navigator function. An essential reference for workshop technicians performing repairs, module replacement, or battery service on this watch model.
Seiko W359A Parts Catalogue and Technical Guide
Parts catalogue and technical guide for the Seiko W359A digital watch module. This service manual provides comprehensive specifications alongside disassembly and reassembly procedures illustrated with numbered component diagrams. The parts list includes reference numbers for every component, backed by circuit block schematics and detailed battery installation guidance. You'll find calibration verification data, documentation of liquid crystal display variants, and complete component breakdowns covering the case back, module assembly, buttons, circuit blocks, battery insulator, and display elements. An essential reference for technicians and hobbyists servicing this module.
Seiko W800A W801A Parts Catalogue and Technical Guide
Seiko W800A and W801A parts catalogue and technical service manual for multi-function digital watches. Covers full specifications, exploded component diagrams, and step-by-step procedures for battery installation, switch spring removal, liquid crystal panel service, buzzer terminal assembly, and module installation. Includes detailed value-checking procedures for verifying time accuracy, measuring upconverter coil resistance, and testing current consumption. Essential reference for repair technicians and watch service professionals needing authoritative parts identification and assembly guidance for these models.
Seiko W850A/W851A/W853A/W854A Parts Catalogue/Technical Guide
Complete parts catalogue and technical guide for Seiko digital watch calibres W850A, W851A, W853A and W854A. Features detailed technical specifications including module size (Ø29.0 mm, 6.0 mm height), display system (Nematic Liquid Crystal FEM), and electronic components. Includes comprehensive exploded parts diagrams with numbered components for quick reference, covering the piezoelectric element, buzzer lead terminal, conductive plates, case back, gasket, module assembly, and button mechanisms. Provides lubrication specifications with silicone oil requirements. Essential reference document for parts identification and technical specifications during watch maintenance and repair operations.
Seiko Y182B Quartz Movement Parts Catalogue and Technical Guide
Complete parts catalogue and technical guide for the Seiko Y182B quartz watch movement. This service manual provides detailed exploded views, comprehensive parts lists with reference numbers, and full technical specifications for the 27.6mm diameter movement. Includes coverage of the electronic circuit reset, stopwatch function, alarm function, battery indicator, and date calendar. The workshop guide walks through disassembly and reassembly procedures, lubrication requirements, and functional testing protocols to ensure reliable operation after repair or maintenance work.
Seiko Y301A, Y302A Parts Catalogue and Technical Guide
Complete parts catalogue and technical service manual for Seiko quartz watch calibers Y301A and Y302A. This workshop reference provides everything needed for professional repair, maintenance, and calibration work on these movements. Detailed specifications cover both case sizes (Ø20.0 mm and Ø23.0 mm) with 1.8–1.9 mm height and 3-jewel construction. Exploded parts diagrams with numbered components show exact placement and relationships of all internal elements. Step-by-step disassembly and reassembly procedures guide technicians through safe removal and reinstallation of movement components, supported by specific lubrication instructions using Moebius A and SEIKO Watch Oil S-6 at designated points. The circuit block structure section explains electrical layout and component function. Precision timing adjustment relies on the 10-second gate measurement method, with pattern cutting system details for frequency fine-tuning and temperature-compensated timing specifications included. Battery compatibility information lists genuine SEIKO SR716SW cells along with equivalent Maxell and Matsushita alternatives (1.55V, approximately 3-year service life). Technical remarks throughout address critical disassembly and reassembly considerations to prevent damage and ensure proper function after service.
Seiko Y432B Caliber Parts List
Seiko Y432B caliber parts list with detailed exploded views showing the complete movement assembly. Provides component references and part numbers for wheels, bridges, jewels, screws, coil blocks, rotor assembly and battery connections. Documents three distinct configurations of center wheel, cannon pinion and hour wheel combinations (types a, b, c) to support repair and assembly work across different watch variants. Essential reference for technicians servicing this quartz movement.
Seiko Y468A Y469A Analogue Quartz Technical Guide
Technical reference guide for Seiko Y468A and Y469A analogue quartz watches. This service manual covers the complete technical specifications for both models, including crystal oscillator frequency of 32.768 kHz, battery designation (Masell SR726SW or equivalent), case diameter, case height, jewel count (2), and operational temperature range. The guide includes detailed schematics and diagrams for the calendar mechanism and setting functions with full component identification. Technicians will find comprehensive procedures for verifying and adjusting output signal characteristics, testing battery voltage and conductivity, confirming circuit block conductivity, establishing reset and secondary setting conditions, checking coil block performance, validating accuracy, assessing battery life indicator function, and measuring current consumption. Multiple reference tables provide quick lookup values for troubleshooting and adjustment work on these quartz watch movements.
Seiko Y652B Parts List and Exploded Diagrams
Comprehensive parts list and exploded diagrams for the Seiko caliber Y652B quartz watch movement. This technical reference details the complete parts numbering system and component nomenclature across all major assemblies—train wheels, pinions, bridges, and balance components—along with circuit block assemblies, battery connection terminals, liquid crystal display frame specifications, and winding stem tolerances. The documentation covers two type variations for the fourth wheel, center minute wheel, and hour wheel configurations, essential for technicians performing movement repair, restoration, or parts identification. Includes reference data for compatible battery types: Seiko, Pulsar, Maxell SR41W, and Sony Everady cells. A must-have service manual supplement for anyone working with Y652B caliber movements.
Seiko Y709A Digital Quartz Service Manual and Parts List
Service manual for the Seiko Y709A digital quartz watch, featuring a Nematic Liquid Crystal display (FEM) and comprehensive technical reference for technicians and watch repair professionals. This workshop manual covers all essential specifications including the 32.768 Hz oscillator, Ø30.1 mm case diameter, 5.9 mm case height, and C-MOS-LSI integrated circuit architecture. The guide provides step-by-step disassembly and reassembly procedures for both case and module components, supported by detailed exploded views and clear illustrations. Lubrication instructions specify silicone grease application (500,000 cs viscosity) at critical points. Comprehensive checking and adjustment sections cover battery voltage testing, liquid crystal panel electrode verification, current consumption measurement, accuracy verification, speaker block inspection, and switch conductivity testing—all essential for thorough service and troubleshooting. A complete parts list details all module components for reference during maintenance and repair. This technical documentation serves as the authoritative repair guide for maintaining the Y709A to factory specifications.
Seiko Y951A Combination Quartz Service Manual and Parts List
Service manual and parts list for the Seiko Cal. Y951A combination quartz watch movement. This comprehensive workshop manual covers movement specifications, fastener identification, and detailed disassembly and reassembly procedures for the panel frame, circuit block cover, and coil block assembly. Includes lubrication guidelines, cleaning methods, and thorough checking and adjustment procedures with circuit block schematic, segment relationships, battery testing, water resistance verification, accuracy checks, and gear train mechanism calibration. An essential reference for watch technicians servicing this movement.
Seiko YT62A AGS Movement Technical Data
Complete technical data manual for the Seiko Cal. YT62A automatic generating system quartz movement, a 12-inch caliber with three hands and date display. This workshop reference documents the 27.0mm diameter, 4.89mm height movement with 32,768 Hz tuning fork oscillator, 6 jewels, and titanium-lithium battery rated at 4.5mAh with 1.5V nominal voltage. Covers movement dimensions, accuracy specification of ±20 seconds per month, operating temperature range from −5°C to +50°C, automatic generating system with quick-start capability, power depletion warning function via 2-second second-hand intervals when voltage drops, and reset switch location at 2H position. Includes detailed battery specifications and separated parts codes for service and repair work. Essential technical reference for watch technicians and service centers maintaining Seiko AGS quartz movements.
Service Guide Cal. V51 Series - Specifications and Servicing
Service manual for Seiko Cal. V51 series quartz movements (V511, V515, V517), providing complete specifications and step-by-step repair procedures. Coverage includes time indication calibration, hand assembly options, electronic step switch configuration, monthly rate tolerance specifications, main plate dimensions, casing diameter and height measurements, quartz tester gate settings, and battery life expectancy (approximately 2 years). Battery specifications cover SR626SW, SR626S, and SR626SW 377 silver-oxide cells. The guide includes essential after-service checkout procedures, current consumption testing protocols, critical movement replacement precautions, winding stem installation technique, and hand fitting instructions. Technical diagrams clearly illustrate battery connection circuits, main plate layout, and train wheel bridge assembly positioning, making this workshop manual indispensable for authorized service centers and experienced watchmakers performing routine maintenance and repairs on these widely-used quartz calibers.
Service Guide Cal. V700A / V701A
Comprehensive service manual for Seiko quartz watch movements Cal. V700A and V701A. This technical workshop guide covers all essential specifications for servicing these movements, including precise movement dimensions, time display configurations with 2 or 3 hands, stepper motor drive mechanisms, and compatible battery types (SEIKO SR616SW, SR621SW variants and equivalent replacements). Features detailed hand installation height discrimination tables for accurate reassembly, circuit block structure diagrams for electrical troubleshooting, and critical value checking parameters for coil block resistance and current consumption verification. Ideal for watch technicians and repair professionals requiring detailed technical reference for these popular quartz calibers.
Service Guide Cal. V722A / V729A
Service guide for Seiko V722A and V729A quartz watch movements. This workshop manual provides essential specifications for both 3-hand and 2-hand configurations, covering movement dimensions, stepper motor drive architecture, and date complication details. Battery information specifies SR920SW silver-oxide cells rated for 3 years of service life. Includes current consumption data critical for diagnostics, a hand-setting height discrimination table for proper installation alignment, circuit block schematic with terminal pin-out reference, and step-by-step procedures for coil resistance measurement and current draw verification against specification limits. An indispensable reference for authorized service centers and experienced technicians performing movement repair, calibration, and battery replacement on these popular quartz calibers.
Service Guide Cal. V742C / V743C
Service guide covering the Seiko quartz watch movements Cal. V742C and V743C. This technical manual provides complete specifications for both calibers, detailing movement dimensions, time indication systems, and winding mechanisms. Covers all functional components including date calendar, day/date calendar, instant setting devices, train wheel setting mechanisms, and electronic circuit reset switches. Includes rate specifications (loss/gain tolerances), battery compatibility reference (SR920SW, SR920W, SR920PSW, SR920NSW, Eveready 371), circuit block schematic diagrams, hand installation height discrimination procedures, and electrical parameter verification (coil block resistance values and current consumption measurements). Essential reference for service technicians performing calibration, repair, and adjustment work on these movements.
Service Guide Cal. V81 Series - Seiko Watch Movement
This is the official Seiko service manual for the Cal. V81 Series quartz watch movement, covering both V810 and V811 variants. The guide provides complete technical specifications for these ultra-thin movements—outside diameter of 15.5mm (measuring 6h to 12h) or 13.0mm (measuring 3h to 9h), casing diameter of 15.1mm, and height of just 3.0mm with zero jewels. The movement operates with 2 or 3-hand time indication driven by a step motor with load-compensated pulse control and includes an electronic circuit reset switch. Monthly rate specification is less than 30 seconds, ensuring reliable timekeeping. Battery compatibility covers SEIKO TR275W, MAXELL SR275W, SONY SR275W, and EVEREADY 319 (1.55V cells with approximately 2-year service life). The workshop manual includes detailed procedures for movement replacement, winding stem removal, and hand installation, plus value checking methodology using the SEIKO Digital Multi Tester S-840A (current consumption specification under 1.4µA). An essential technical reference for watch repair technicians and service centers working with these Seiko quartz movements.
Service Guide Cal. V828A - Seiko Quartz Watch Movement
Complete technical service guide for the Seiko caliber V828A quartz watch movement. This documentation provides detailed specifications for a 3-hand time display mechanism with 18.5mm outside diameter (6h-12h position) and 16.8mm (3h-9h position), 17.8mm casing diameter, and 4.2mm height. The movement features a step motor with load-compensated driving pulse system, day-and-date calendar function with instantaneous date correction, and an electronic circuit reset switch. The service manual covers movement replacement procedures, winding stem installation techniques, and hand installation with cross-references to the V81 series documentation. Current consumption verification is detailed using the Seiko Digital Multi Tester S-840A, with technical data showing 0 jewels, no regulation system, a 10-second measuring gate, and compatibility with SR265W, SR826SW, or 377 batteries (1.55V nominal, approximately 2 years service life). The movement maintains a monthly rate variance of less than 30 seconds under normal temperature conditions. Includes cross-sectional and face views of the movement at 2.0x magnification along with comprehensive technical diagrams for troubleshooting and repair work.
Service Guide Cal. V829A - Quartz Movement
Comprehensive service guide for the Seiko V829A quartz movement, designed for professional watchmakers and service technicians. Details the movement's core specifications including 18.2mm diameter, 17.8mm case dimension, and 4.2mm height, along with the three-hand display architecture and step motor driving system that characterizes this caliber. Covers critical after-sales servicing considerations specific to this movement, including the heat-treated component construction and the non-serviceable design philosophy that shapes repair strategy. Provides detailed movement replacement procedures covering winding stem handling and correct hand installation sequences. Includes comprehensive value checking and verification protocols, with particular emphasis on current consumption testing procedures using a specified digital multimeter to verify movement functionality and power draw specifications. An essential reference for authorized Seiko service centers and independent watchmakers working with this caliber.
Service Guide CAL. Y482F - Seiko Watch Movement
Service guide for the Seiko caliber Y482F quartz watch movement, providing complete technical specifications and repair information for authorized service centers and skilled technicians. Movement dimensions are 18.4mm outside diameter, 17.8mm casing diameter, and 2.8mm height. The Y482F uses a two-hand time indication system driven by a step motor with load-compensated driving pulses, ensuring accurate timekeeping across varying conditions. An electronic reset switch enables accuracy checks, while a 10-second measuring gate supports precision testing. The movement runs on a 1.55V battery—either SR621SW or 364 type—with typical life expectancy around 2 years under normal use and current consumption below 1.2µA. The guide covers winding stem replacement procedures and hand installation techniques, essential knowledge for completing movement service and restoration on this caliber.
Service Guide Cal. Y97 Series Watch Movement
Seiko Y97 series watch movement service guide covering the Y974A, Y975A, and Y977A calibres. This repair manual provides complete after-sales servicing procedures, technical specifications, hand installation instructions, crown removal steps, and detailed movement operation verification with power supply connection diagrams. Includes alarm function testing methodology, melody alarm identification specific to the Y975 model, and electrical value checking procedures using a digital multimeter. Features technical illustrations and assembly details essential for professional workshop maintenance and repair work.
Service Guide for Cal. W204A and Cal. W207A Watches
Seiko service guide covering two LCD quartz watch calibers: the Cal. W204A and Cal. W207A. The Cal. W204A features a nematic liquid crystal display showing time, calendar, and seconds, with automatic calendar function and ø18.5mm module diameter. The Cal. W207A offers a broader feature set including time, 24-hour mode, stopwatch, and alarm functions plus hourly chime, housed in a ø18.7mm module. Both calibers employ multiplex drive systems and automatic calendar mechanisms typical of Seiko's digital watch platform. The guide covers essential service procedures: current consumption verification, battery clamp removal techniques, and quartz oscillator testing specifications. Intended for qualified service technicians performing maintenance, adjustment, and component-level diagnostics on these models.
Service Guide for Seiko Cal. V722C and V729C Quartz Watches
Service manual for Seiko Cal. V722C and V729C quartz movements, providing comprehensive technical data for watchmakers and service technicians. Documents movement specifications including physical dimensions, time display functionality, and stepper motor drive system. Covers battery types (SR920SW and equivalents) with detailed hand installation height discrimination tables for proper assembly. Includes circuit block structure and electrical schematics (part number 4000 633) essential for diagnosis and repair. Electrical parameter verification section addresses coil resistance and current consumption testing, making this workshop manual indispensable for routine maintenance, troubleshooting, and component-level service of these popular Seiko quartz calibers.
Service Manual CAL. V515B - Movement Specifications and Replacement Procedures
Service manual covering the Seiko caliber V515B quartz movement, providing technicians with essential specifications and step-by-step replacement procedures. Clearly documents dimensional differences between V515B and V515A calibers—outside diameter ranging from Ø15.3mm to Ø18.2mm, casing diameter Ø18.1mm, and height variations of 2.99mm versus 3.09mm—helping ensure correct movement selection during service work. Includes practical current consumption testing methodology using the SEIKO Digital Multi-Tester S-840A, along with complete technical specifications for both SHORT (AMF910P) and STANDARD (AMF920P) movement variants. An indispensable reference for authorized service centers and watchmakers performing V515B movement servicing and replacement.
Service Manual Cal. V735C/V736C Quartz Watch Movement
Complete service manual for Seiko Cal. V735C and V736C quartz watch movements, featuring a precision step motor with load-compensated driving pulse technology. Provides detailed movement specifications including physical dimensions (Ø24.0mm, height 2.78mm, single jewel), hand installation height discrimination chart for proper alignment, battery connection polarity markings, and circuit block architecture diagram showing crystal unit and input/output terminals. Technical data includes coil block resistance specifications (1.18–1.68 kΩ) for diagnostic testing, comprehensive mechanical specifications for the date/day calendar mechanism with instant-setting capability, electronic circuit reset switch operation, and battery life indicator function. Equipped with 1.55V battery with approximately 4-year service life. Essential reference for authorized service technicians performing calibration checks, parts replacement, movement assembly, and troubleshooting of these reliable quartz movements.
Service Manual Cal. W339B - Seiko Digital Watch Module
Service manual for the Seiko Cal. W339B digital watch module, providing comprehensive technical documentation for technicians and authorized service centers. Details module specifications and dimensions (27.4mm diameter), display technology (nematic liquid crystal with 1/4 multiplex driving system), and full operational functions including time and calendar display, stopwatch with up to 30 hours of timing capacity, timer, 3-channel alarm system, and dual time display for different zones. Covers additional mechanisms such as sound demonstration, illuminating light feature, all-segments light-up capability, and hourly time signal. Provides battery specifications (SEIKO/SONY/MATSUSHITA CR2025, 3.0V with 5-year rated life), current consumption data (less than 4.0µA), and step-by-step procedures for module replacement and battery installation with button reset instructions. Includes technical notes on differences between Cal. W339A and Cal. W339B specifications and parts compatibility information essential for correct servicing and module interchangeability. Useful repair reference for workshop technicians working with Seiko quartz watch movements.
Service Manual CAL.V744C - Seiko Quartz Movement
Complete service manual for the Seiko Cal.V744C quartz movement, covering all technical specifications and repair procedures for this precision timekeeping module. Movement dimensions: outside diameter ∅26.4mm (23.5mm between 6-12 o'clock, 23.5mm between 3-9 o'clock), casing diameter ∅25.6mm (23.5mm between 6-12 o'clock, 21.9mm between 3-9 o'clock), height 2.78mm. The movement features three-hand time display with integrated day and date calendar function, instant setting device, train wheel setting mechanism, and electronic circuit reset switch. Drive system uses a load-compensated step motor with compensated driving pulse operation. With no regulation system required, monthly rate stays below 20 seconds at normal temperature. Documentation includes a hand installation height discrimination table (numerals 1-2 with corresponding movement reference numbers), circuit block structure diagram (Part No. 4000 833, showing C-MOS-IC with crystal unit and complete terminal specifications), and essential performance data including coil block resistance range 1.18-1.68 kΩ, total movement current consumption under 1.2µA, and isolated circuit block consumption below 0.28µA. Power source: SEIKO SR920SW, MAXELL SR920SW, SONY SR920SW, MATSUSHITA SR920SW, or EVEREADY 371 cells (1.55V, approximately 5-year service life). Movement contains 1 jewel bearing. For after-sales servicing, the workshop manual covers whole movement replacement procedures, with circuit block components available separately from Seiko.
Service Manual for Caliber V800A Quartz Movement
Service manual for the SEIKO Caliber V800A quartz watch movement, providing comprehensive technical specifications and repair guidance. Movement dimensions are precisely detailed: 18.4mm outside diameter at the 6h–12h position, 15.3mm at the 3h–9h position, with a casing diameter of 17.8mm and height of 1.9mm. The movement employs a step motor with load-compensated driving pulse technology and delivers 2-hand time indication with 20-second hand intervals. It incorporates a 10-second quartz tester measuring gate. Zero jewels construction simplifies maintenance and repair procedures. Compatible with SEIKO, MAXELL, or MATSUSHITA SR616SW batteries (1.55V), delivering approximately 3 years of operating life. Monthly accuracy maintains ±20 seconds or better across the normal temperature range. This workshop manual includes detailed instructions for winding stem removal procedures and complete current consumption specifications (less than 0.7µA for the full movement assembly), making it essential reference documentation for service technicians working on this caliber.
Service Manual for Seiko Cal. V732C/V733C/V739C
Service manual for three precision Seiko quartz watch movements (V732C, V733C, V739C) offering detailed repair and maintenance guidance for professional technicians. The manual covers movements with Ø24.0 mm diameter and case diameter Ø23.3 mm, spanning heights of 2.57–2.78 mm. V732C and V733C feature 3-hand display systems, while V739C operates as a 2-hand model. Core technical content includes step motor drive architecture, date and day-date calendar mechanisms, battery specifications (SR920SW 1.55V cells rated for approximately 5 years of service life), coil block resistance values (1.18–1.58 kΩ range), movement current consumption data (under 5 µA for complete movement operation, under 0.28 µA for circuit block isolation), hand installation height discrimination reference tables, and circuit block structural diagrams (Seiko Part No. 4000 833). The manual provides exhaustive value-checking procedures and electrical parameter verification protocols essential for accurate diagnosis, adjustment, and repair work. An authoritative workshop reference for watch service professionals handling these three movement calibers.
Service Manual for Seiko Cal. V735A / V736A
Service manual for Seiko Cal. V735A / V736A quartz movements, providing comprehensive technical documentation for repair and maintenance of these precision stepping-motor mechanisms. Covers movement specifications including Ø 24.0mm outside diameter, Ø 23.3mm casing diameter, and 2.7mm height, along with three-hand time indication and load-compensated stepping-motor drive system. Details calendar functions (date only, or combined day/date with instant-set mechanisms), train wheel adjustment device, electronic circuit reset function, and battery life indicator. Accuracy specifications show less than 20 seconds monthly gain or loss. Includes regulation system parameters and measuring-gate settings essential for service checks. Hand installation reference table with dial numeral positioning coordinates ensures proper dial integration during assembly. Electronic schematic shows complete circuit block structure with terminal identification for input, coil output, crystal unit, and C-MOS IC connections. Battery specifications cover SR920SW variants from Seiko, Maxell, Sony, Matsushita, Eveready, and Fujitsu, each with approximately 3-year operational lifespan. Provides critical value-checking data including coil block resistance range (2.4kΩ–2.8kΩ) and current consumption figures for diagnostic troubleshooting. Essential reference for watchmakers and service technicians working with these movements.
Service Manual for Seiko Caliber V544A Quartz Step Motor Movement
Service manual for the Seiko Caliber V544A quartz step motor movement. This workshop manual provides complete technical specifications for this compact three-hand caliber, including outside diameter Ø26.4 mm, casing diameter Ø25.6 mm, and height 3.57 mm. Covers after-sales servicing procedures, day-date disk and dial configuration, battery compatibility (SEIKO SR927SW, MAXELL SR927SW, SONY SR927SW, EVEREADY 395) with 1.55 V specification and approximately 3 years service life. Includes detailed operating procedures for the load-compensated step motor drive, current consumption testing parameters, and measurement procedures using the SEIKO Digital Multi Tester S-840A for electrical verification. An essential reference for authorized service centers and qualified technicians maintaining this movement.
Service Manual Seiko Cal. V742A / V743A Watch Movement
Service manual for the Seiko Cal. V742A and V743A quartz watch movements. This workshop manual provides complete technical specifications and repair guidance for these compact movements, which measure Ø26.4mm in overall diameter with a casing diameter of Ø25.5mm and a height of 2.9mm. The movements feature three-hand time display with date calendar functionality and an instant date-setting device, powered by a step motor with load-compensated pulse-type driving system. The electronic circuit incorporates a reset switch for servicing. You'll find a detailed hand installation height discrimination table with printed position examples for both standard and extra-long hand types, essential for proper reassembly. Battery connection notes reference Seiko manufacturing marks from SHIOJIRI LTD or MORIOKA HATTORI INC facilities. The circuit block diagram identifies the crystal oscillator and CMOS-IC input/output terminals. Value checking procedures specify coil block resistance of 2.4kΩ to 2.8kΩ and current consumption limits, with an accuracy standard of less than 20 seconds monthly loss or gain. These 0-jewel movements run on a Seiko SR920SW mercury battery rated at 1.55V with approximately 3 years service life. The manual includes after-sales servicing system information for authorized technicians.
Supplement to Parts Catalogue/Technical Guide Cal. 3M22A - Power Resource Change
Supplement to the Parts Catalogue and Technical Guide for Seiko caliber 3M21A/3M22A, documenting the transition from the original capacitor unit (3029 011) to an improved rechargeable battery unit (3027 29N). The guide presents a comparative performance matrix tracking indicator display duration and balance wheel swing counts across both power sources, helping technicians understand the operational advantages of the new design. Includes a detailed parts list with identification diagrams and practical installation guidance covering capacitor clamp compatibility. Critical specification: the new rechargeable battery unit and its corresponding clamp assembly must be sourced together as set 3027 3MZ to prevent short circuit risk or internal movement damage during installation and operation.
Technical Data for Caliber V535A, V536A, V539A
Technical data and specifications manual for Seiko quartz watch movements covering calibers V535A, V536A, and V539A. This workshop reference documents precise dimensional data for these compact movements—Ø24.0mm diameter with heights ranging from 3.47 to 3.74mm—along with dial layouts and hand configurations (3 or 4-hand time indication). Includes battery specifications for the 1.65V SR927SW cell with an expected service life of approximately 3 years and current consumption under 2.2µA for power budgeting. Details special features such as 24-hour subdials, date windows, and the instant calendar setting mechanism. Covers practical value-checking procedures essential for quality control and after-sales servicing, including component replacement protocols and winding stem sourcing. An indispensable reference for technicians performing maintenance, module swaps, and repair work on these caliber lines.
Technical Guide and Parts List for Calibre V249A Analogue Quartz
Technical service manual and comprehensive parts list for Seiko Calibre V249A analogue quartz movement. Provides complete specifications for this compact 18.4 mm diameter movement with 2.7 mm height and single jewel construction, designed for 17.8 mm watch cases. Covers detailed disassembly and reassembly procedures with step-by-step lubrication guidance using Moebius A watch oil in both standard and small application quantities. Includes checking and adjustment protocols essential for accurate timekeeping, along with a full parts breakdown for sourcing and replacement components. Essential reference for watch technicians and repair professionals working with this Seiko quartz caliber.
Technical Guide and Parts List for Seiko Caliber V031A Combination Quartz
Technical service manual and comprehensive parts list for the Seiko caliber V031A combination quartz watch movement, covering both analog and digital display sections. This workshop guide provides detailed specifications for all mechanical and electronic components, a complete inventory of screws and fasteners with specifications, operation instructions including precise time-setting procedures, step-by-step disassembly and reassembly procedures with exact lubrication points and specifications, systematic checking and adjustment procedures for the circuit block and movement assembly, functional testing of reset and alarm mechanisms, stopwatch display operation and troubleshooting, and a fully indexed parts list with all factory part numbers for component identification and ordering.
V337A Quartz Watch Movement Parts Catalogue and Technical Guide
Comprehensive parts catalogue and technical guide for the Seiko V337A quartz watch movement, an essential reference for technicians servicing and repairing this precision timepiece. Provides detailed movement specifications including physical dimensions (Ø24.0 mm, 21.3 mm height including battery section), three-hand time indication system, and step motor with load-compensated driving pulse regulation. Documents all key functional components: calendar mechanism, instant date-setting device, electronic circuit reset switch, and second-hand setting device. Includes exploded view diagrams with numbered component references for accurate parts identification and assembly guidance. Battery specifications cover the SR916SW cell (supplied by Seiko, Matsushita, or Maxell), rated 1.65V with approximately 3 years operating life and 1 jewel bearing. The regulation system employs NIL adjustment, and winding stem configuration is fully illustrated. Published by Hattori Seiko Co., Ltd., this workshop manual serves as the authoritative technical resource for V337A movement maintenance, repair, and parts replacement procedures.
Y130A, Y131A Parts Catalogue and Technical Guide
Parts catalogue and technical guide for Seiko Cal. Y130A and Y131A quartz watch movements. This repair manual provides detailed specifications and annotated parts diagrams identifying each component by reference number. The workshop guide covers complete disassembly and reassembly procedures for hands, dial, dial washer, winding stem, wheels, and pinions. Includes essential reference data for coil block resistance and current consumption measurements. Electronic reset switch mechanism explained with operational detail. Three-hand time indication system with seconds-setting device configuration. Comprehensive technical resource for service technicians and watchmakers working on these Seiko calibers.
Y150A Movement Parts Catalogue and Technical Guide
Parts catalogue and technical guide for the Seiko Cal. Y150A quartz movement. This service manual covers complete specifications, step-by-step disassembly and reassembly procedures, detailed parts list with numbered exploded diagram, circuit block architecture, and valve checking protocols. The Y150A movement features a 2-hand display with 20-second step intervals and uses a stepper motor drive system, delivering approximately 3 years of battery life when powered by SR416SW mercury cells at 1.55V. An essential reference for repair technicians and watchmakers servicing this reliable quartz caliber.
Y514 150m Diver's Watch Technical Guide
Technical guide for the SEIKO Y514 150m diver's watch with quartz movement. This workshop manual covers complete disassembly and reassembly of the crystal retaining assembly, with detailed illustrated breakdowns of every component: rotating ring, rotating ring gasket, crystal, crystal gasket, dial rings, middle case, stem and crown assembly, movement with dial, case ring, case spring, case back gasket, and case back. Includes precise water-resistance testing procedures and a full cross-sectional diagram of the internal mechanism. Essential reference for technicians and service centers performing maintenance, repair, or regulation of this professional-grade dive watch.
Y590 Analog Quartz Watch Technical Guide and Parts List
Comprehensive technical guide and parts list for the Seiko caliber Y590 analog quartz movement. This service manual covers the full specifications of this compact 2-hand quartz watch—13.0 × 15.15 mm case diameter, 2.8 mm movement height, powered by a silver oxide battery, with 2 jewels for precision regulation. Includes circuit schematic diagram essential for electrical diagnostics and repair verification. Details every screw specification used throughout the movement for accurate reassembly. Step-by-step disassembly and reassembly procedures with technical illustrations guide you through casing removal, winding stem service, minute hand installation, dial handling, and hour wheel positioning. Dedicated sections on cleaning and proper lubrication techniques keep the mechanism operating smoothly. Thorough checking and adjustment procedures cover battery voltage and conductivity testing, coil block performance verification, gear train mechanism inspection, and accuracy calibration—everything needed for complete movement restoration and certification. An essential workshop manual for watch technicians and experienced hobbyists servicing Seiko quartz caliber Y590 movements.
Y765A Digital Quartz Technical Guide
Technical service manual for the Seiko Y765A digital quartz watch. Provides complete specifications for the Nematic Liquid Crystal display, covering time, alarm, stopwatch, and game display modes. Includes detailed disassembly and reassembly procedures for both the module and case, along with practical cleaning instructions and documentation of liquid crystal panel component relationships. The repair guide features comprehensive checking and adjustment protocols covering battery voltage and conductivity testing, current consumption measurement, water resistance verification, liquid crystal panel and circuit block diagnostics, accuracy calibration, operational verification, switch component conductivity checks, bulb inspection, and alarm function testing. Contains circuit block schematics and complete battery specifications for accurate service and troubleshooting.
Y772A Digital Quartz Technical Guide and Parts List
Technical guide and parts list for the Seiko Y772A digital quartz watch caliber. This comprehensive workshop manual covers all essential specifications including the nematic liquid crystal display, 28.1 mm case diameter, and 4.9 mm height. Details the full range of display functions — time, alarm, stopwatch, timer, calendar, birthday setting, and time setting — along with specialized mechanisms such as the pattern segment checking system, illuminating light function, system reset capability, and alarm test system. Includes battery specifications for CR2016/BR2016 cells (3.0V nominal, approximately 2 years operational life) with detailed checking and adjustment procedures. The repair manual provides step-by-step protocols for battery insertion, system initialization, and comprehensive diagnostic testing, making it essential reference material for service technicians maintaining this movement.