Seiko Quartz Cal. 7A38A Parts Catalog and Technical Guide
Complete parts catalog and technical service manual for Seiko Quartz caliber 7A38A chronograph watch movement. Includes detailed exploded diagrams of all components, comprehensive parts list with numbered references, specifications (29.0 mm diameter, 4.6 mm height, 15 jewels), designation and operation instructions, disassembly and reassembly procedures, lubrication points, and setting procedures for the step rotor and gear train. Features chronograph functions with separate minute and second bridges, day and date calendar, and battery information (Maxell SR936SW, 1.55V, approximately 2 years life).
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Document Details
- Format
- Pages
- 9
- Size
- 378.9 KB
- Category
- Horlogerie