Cal. 8N20A Parts Catalogue and Technical Guide
Complete parts catalogue and technical guide for the Seiko Cal. 8N20A quartz watch movement. This workshop manual covers movement specifications and dimensions, detailed disassembly and reassembly procedures, comprehensive parts list with numbered components and exploded diagrams, lubrication schedules, value checking protocols, and time accuracy adjustment instructions. Includes circuit block structure diagram, battery specifications, and technical remarks on key assemblies including train wheel bridge, setting lever mechanism, and winding stem selection. Essential reference for service technicians and watch repair professionals working with this movement.
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Document Details
- Format
- Pages
- 6
- Size
- 149.0 KB
- Category
- Watchmaking