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.
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Document Details
- Format
- Pages
- 9
- Size
- 266.5 KB
- Category
- Watchmaking