Seiko Caliber 21D Watch Movement Parts List
Complete technical parts list and repair reference for the Seiko caliber 21D automatic watch movement, specifically the Sportslady 17J variant. This service manual provides casing dimensions (17.80 x 15.30 mm), movement specifications (19,600 vibrations per hour), and detailed exploded diagrams showing the full disassembly sequence. Covers all major components including the balance cock, barrel arbor, gear train wheels, escape pinions, and jeweled bearing assemblies. Each part includes its official Seiko reference number, making this essential for sourcing replacement components or performing complete movement overhaul and restoration work. Cross-reference notes identify compatible parts across the caliber 21D range, helping technicians match correct specifications during reassembly.
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Document Details
- Format
- Pages
- 1
- Size
- 103.6 KB
- Category
- Watchmaking