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.
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Document Details
- Format
- Pages
- 8
- Size
- 264.4 KB
- Category
- Watchmaking