Seiko Cal. 4205B, 4206B, 4207B Parts Catalogue & Technical Guide
Complete parts catalogue and technical workshop guide for Seiko automatic watch movements Cal. 4205B, 4206B, and 4207B. Provides exact movement specifications (17.5mm outer diameter, 17.2mm case diameter, 5.6mm height, 21,600 beats per hour, 17–21 jewels) essential for service and repair work. Features comprehensive numbered parts diagrams with full component listings and screw torque data, step-by-step disassembly and reassembly procedures with proper lubrication points and techniques, and detailed assembly notes for technicians. Covers dial guards, date wheel mechanisms, balance assembly configurations, and automatic winding systems. Indispensable reference for watch repair professionals and experienced hobbyists working on these three calibers.
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Document Details
- Format
- Pages
- 8
- Size
- 221.2 KB
- Category
- Watchmaking