LONGINES - Service Manuals
23 manuals available for download
Longines is a prestigious Swiss watchmaker with a heritage spanning centuries of precision timekeeping and mechanical innovation. Our comprehensive catalog offers authentic service manuals, repair guides, and technical documentation for Longines movements and calibers, enabling watchmakers and technicians to perform maintenance, troubleshooting, and restoration work with confidence. Each PDF download includes detailed parts lists, assembly diagrams, and workshop specifications designed to support both routine servicing and complex repairs across the brand's extensive mechanical watch collection.
ETA 251.252/251.262/251.272 Movement Technical Data
Technical documentation for ETA 251.252, 251.262, and 251.272 watch movements (13¼''' caliber, Ø 30 mm diameter). Complete parts list with interchangeability specifications and material designations for all components across the three caliber variants. Includes detailed diagrams showing movement configurations for the main plate, upper plate, and bridge assemblies.
Longines 5601, 5602 - Component Concordance Table
Technical component concordance table for Longines caliber 5601 and 5602 mechanical movements. Page 1 provides a comprehensive numbered cross-reference of watch components between the two calibers, detailing plates, bridges, wheels, springs, screws and mechanical assemblies essential for repair, maintenance and parts identification. Page 2 features exploded views and technical illustrations of each referenced component, with part numbers and visual identification drawings to support disassembly, reassembly and troubleshooting. An indispensable reference for watchmakers and technicians servicing these movements.
Longines 950.2, 952.2, 953.2, 954.2 Service Manual Part 4
Part 4 of the Longines service manual for quartz movements 950.2, 952.2, 953.2, and 954.2, covering assembly and lubrication procedures. This section provides detailed instructions for positioning the calendar drive wheel, installing and oiling the escape wheel spring, mounting the minute wheel and related components, as well as adjustment and control procedures for the quartz mechanism at various assembly stages. Technical specifications for escapement components and pivoting parts are included with precise positioning guidelines for workshop technicians.
Longines 950.2, 952.2, 953.2, 954.2 Technical Communication Part 3
Part 3 of the Longines technical communication covering movement reconditioning procedures. This section details disassembly procedures for the movement, including removal of the double hour wheel (2558), hairspring 4929, wheels (54038), electronic module 4000, bridge fasteners, and various other components with specific part numbers and handling precautions. Includes detailed photographic illustrations showing proper removal sequences and component placement to prevent damage during servicing.
Longines Caliber 340 Technical Data and Parts List
Technical data and illustrated parts list for the Longines automatic watch movement caliber 340. This document provides detailed component identification with numbered references, exploded views of the movement and mainplate, and dimensional specifications (27.00mm height, 4.45mm thickness). The caliber specifications include: 12-ligne, 17 jewels, center second, automatic, 19800 oscillations per hour. Complete screw reference catalog included. Essential technical reference for watchmakers and technicians.
Longines Caliber 890 Parts Concordance Table — Technical Data
Longines Caliber 890 Parts Concordance Table — technical reference covering calibers 890.1, 890.2, 891.1, 891.2, 892.1, 892.2, 893.1, and 893.2. Includes a comprehensive parts concordance table with cross-reference numbers for each caliber variant and detailed component designations. The table systematically maps all mechanical movement parts including main plates, springs, gear wheels, screws, levers, barrel, hairspring, balance wheel, and specialized escapement components. Essential reference documentation for watch repair technicians and restoration specialists identifying parts accurately during service work on these Longines movements.
Longines Caliber L995.2, L996.2, L997.2, L998.2 Technical Data
Technical data for Longines caliber L995.2, L996.2, L997.2 and L998.2 movements. These round 11.5mm manual winding movements feature two barrels in series, 17 jewels, lever escapement and 28,800 vibrations per hour. Technical documentation provides characteristics of the motor system, transmission, escapement and regulating system, with mechanical illustrations of movement components.
Longines Calibre 19AS Watch Movement Technical Sheet
Technical specification sheet for the Longines Calibre 19AS automatic watch movement. Includes mechanical diagrams showing front and back views of the complete movement, baseline caliber specifications (height 23.30 mm, width 6.00 mm, nominal weight 8.68 g), and detailed numbered component parts diagram for service reference. Documents variant configurations with 17 or 19 rubies, different escapement designs, and operating frequency of 18,000 beats per hour.
Longines Calibre 280 Movement Parts Diagram
Technical parts diagram and reference guide for the Longines Calibre 280 mechanical watch movement. Presents two detailed views of the complete movement assembly with dimensional specifications (26.50mm height, 3.90mm width) essential for service and repair work. Includes a comprehensive numbered breakdown of all internal components—gears, springs, jewels, screws, and precision parts—each with corresponding reference numbers and assembly instructions. An indispensable resource for watchmakers and technicians performing maintenance, repair, or restoration of Calibre 280 movements, providing the mechanical detail required for accurate component identification and proper reassembly.
Longines Calibre 380 Movement Technical Specifications
Longines Calibre 380 automatic movement technical specifications covering four escapement variants: 12½''' Ancre, Pallet-fork, Ancora, and Anker configurations, each rated at 19,800 vibrations per hour. Documentation includes assembly diagrams presenting top and bottom views of the complete movement, precision dimensional drawings (28.00 mm height, 5.20 mm width), and a fully annotated parts breakdown identifying every component from balance wheels and hairsprings to escape wheels, pallets, and jewel mountings. All four versions incorporate 27-jewel specifications with center-seconds capability. Essential reference for watchmakers and technicians performing Calibre 380 service, repair, or restoration work.
Longines Calibre 430 Movement - Parts List and Technical Drawings
Technical service documentation for the Longines Calibre 430 automatic movement. This workshop reference includes complete movement specifications (11.5 lignes, 17 jewels, 36,000 vibrations per hour), exploded views showing the full mechanical assembly, and precision technical drawings with dimensional data (25.60mm diameter, 4.30mm thickness). The illustrated parts list provides reference numbers for all individual components—plates, wheels, springs, jewel settings, screws, and every other mechanical element—making it an essential manual for watchmakers performing maintenance, repair, or restoration of this caliber. Each part is clearly identified for accurate identification and ordering.
Longines Calibre 431 Movement Parts List
Longines Calibre 431 automatic movement parts catalog with detailed component diagrams and specifications. This technical reference covers the complete mechanical assembly of this robust 11.5-ligne (25.60mm diameter) platform: mainplates and train bridges, gear train wheels, balance wheel and hairspring assemblies, jewel settings, screws, hands, dial components, and associated parts. Component identification diagrams illustrate all parts with reference numbers for accurate sourcing and identification. Multiple movement variants documented: center-second, sweep-second, and calendar-equipped versions. Rated at 17 jewels and 36,000 vibrations per hour. Essential reference for watchmakers identifying components, sourcing replacements, or understanding movement architecture.
Longines Calibres L 890, L 891, L 892, L 893 Technical Manual
Longines Calibres L 890, L 891, L 892, L 893 Technical Data — comprehensive technical documentation for eight automatic movement variants: L 890.1, L 890.2, L 891.1, L 891.2, L 892.1, L 892.2, L 893.1, and L 893.2. These 12-ligne round movements operate at 28,800 vibrations per hour with dual coaxial barrels. Technical specifications detail movement construction, gear train configuration, escapement design, balance wheel specifications, and rotor assembly. Comparison plates document the structural differences between movements with and without instantaneous date complications and quick-correction mechanisms. Reference document for watchmakers and technicians.
Longines L.650.2/L.651.2/L.651.3 Watch Movement Technical Data
Technical data sheet for Longines L.650.2, L.651.2, and L.651.3 chronograph movements—precise specifications for watchmakers and repair technicians servicing these ETA-based calibers. Details movement geometry (28 mm diameter, 6.10 mm height, 26,000 beats per hour, 42-hour power reserve, 37 jewels, 53° balance lift angle), dial configurations, and complete movement plate layouts. Comprehensive interchangeability reference table cross-references all components with ISO standards and material designations across all three caliber variants. Includes detailed parts illustrations and technical drawings for accurate identification and maintenance work.
Longines L420.1 ETA 282.001 Technical Information
Technical Information sheet for the Longines L420.1 quartz movement based on the ETA 282.001 caliber. This document provides dimensional specifications (13.00 x 18.20 mm) and height measurements for correct movement and battery positioning. Exploded diagrams show the internal mechanism from multiple angles to clarify component layout. The parts list includes interchangeability table cross-referencing each component with ISO designation numbers and trilingual material descriptions.
Longines L950.2, L952.2, L953.2, L954.2 Movement Technical Data
Technical data documentation for Longines quartz watch movements L950.2, L952.2, L953.2, and L954.2. Provides detailed technical characteristics and performance specifications for these 11½" round electronic quartz movements with analog display and 11 jewels. Covers caliber presentation, technical characteristics, performance parameters, operating instructions and recommendations, component parts concordance table, tools and equipment requirements, standard maintenance operations, movement reconditioning, electrical testing procedures, and battery testing protocols. Essential technical reference for watchmakers and service technicians working with these Longines calibers.
Longines L950/L952/L953/L954 Technical Communication - Equipment and Operations
Part 2 of the technical documentation for Longines L950, L952, L953, and L954 calibers. This technical communication provides equipment specifications and operational procedures for professional service of these movements. Covers specialized tooling for the L950 family including dial carrier with adjustable support screw, isolated screwdriver, ESAMETRE 2 control device, and chronometer comparators equipped with inductive, acoustic, and electrical pickup systems. Includes operational procedures for battery replacement, regulator adjustment on the 1.55 volt stabilized circuit, instantaneous rate control verification within ±0.20 to ±0.30 s/d tolerances, and trimmer adjustment. An essential technical reference for technicians maintaining these precision Longines movements.
Longines L960 Movement Parts List and Concordance Table
Parts list and concordance table for the Longines L960 watch movement. This technical document includes numbered component designations (100–54060) with corresponding mechanical part names, exploded diagrams, and detailed identification of individual components including mainplate, bridges, wheels, jewels, screws, and electronic module assembly. Essential reference for technicians identifying and sourcing components of the L960 movement. The parts list cross-references each component with its technical designation, making it straightforward to verify component names, locate parts, or consult assembly procedures during technical work.
Longines L970, L974, L976, L977, L978 Movement Service Manual
Service manual pages 11-24 providing complete movement service procedures for Longines calibers L970, L974, L976, L977, and L978. Covers standard movement exchange, disassembly, cleaning, and reassembly with detailed step-by-step instructions for each operation. Includes component concordance table for parts identification, technical specifications, lubrication guidelines, and movement reconditioning protocols. Features photographic documentation of internal mechanisms and troubleshooting guidance to diagnose and resolve common service issues. Essential reference for watchmakers and repair technicians performing routine maintenance or corrective work on these movements.
Longines L970.2/L974.2/L976.2/L977.2/L978.2/L270.2/L273.2 Maintenance Manual
Maintenance manual No. 34 covering seven Longines quartz watch calibers (L970.2, L974.2, L976.2, L977.2, L978.2, L270.2, L273.2). Contents include presentation, technical characteristics and performance specifications, operating instructions and recommendations, parts list with concordance table, tools and equipment, routine service operations, standard movement exchange, movement reconditioning, electrical control, and battery testing procedures.
Longines L990 Technical Communication - Equipment and Operating Procedures
Technical documentation for Longines L990 caliber movements covering the tools and equipment required for service operations, including specific caliber-family equipment and general-purpose tools. Also includes detailed operating procedures for control, adjustment and regulation of movement rate, balance wheel positioning, and glass replacement specifications.
Longines L990.1 L990.2 Assembly and Lubrication Technical Manual
Comprehensive technical manual for assembly and lubrication of Longines L990.1 and L990.2 watch movements. This manual provides detailed step-by-step reassembly procedures covering pivots, correctors, escapement assemblies, gear trains, balance wheel and hairspring units, and shock absorbers, illustrated with precision technical photographs and numbered component references. Includes lubrication point mapping across the movement with detailed assembly sequences (sections 8.4.1 through 8.4.11) essential for watchmakers and technicians performing complete movement overhaul and restoration.
Longines L990.1, L990.2, L992.1, L992.2, L993.1, L993.2, L994.1, L994.2 Technical Data
Technical data sheet for Longines automatic calibers L990.1, L990.2, L992.1, L992.2, L993.1, L993.2, L994.1, and L994.2. Document number 18. Covers movement specifications including 11½ ligne round automatic movements with anchor escapement, 28,800 alternations per hour, caliber designation (17 or 25 rubis variants), and basic mechanical characteristics for each caliber variant including second hand configuration, stop-second function, instantaneous date calendar, and three-position correction stem features.