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.