Seiko 5206A Calendar Movement Parts List and Technical Data
Complete parts list and technical data for the Seiko 5206A automatic watch movement, a 23-jewel caliber widely used in professional dress watches and field instruments. Includes detailed specifications for the 25.60mm case diameter, 8.95mm thickness, and 28,800 vibrations per hour beat rate. The manual provides comprehensive component diagrams with full parts numbering, essential reference material for watchmakers performing repairs, overhauls, or replacements. Detailed sections cover the calendar mechanism—date finger, setting levers, and holding rings—critical knowledge for servicing the date-change function. Technical notes document micro-adjustment procedures for regulation and verification, along with notes on water-resistance case variations and assembly tolerances. A practical resource for professional horologists and serious enthusiasts working on authentic Seiko movements.
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Document Details
- Format
- Pages
- 8
- Size
- 607.8 KB
- Category
- Watchmaking