Seiko 2505A Seikomatic Lady Calendar Technical Data & Parts List
Technical data and comprehensive parts list for the Seiko 2505A automatic wristwatch movement. This service manual covers the complete 17.20mm diameter movement with specifications including 5.50mm maximum height, 19,800 vibrations per hour operation, automatic winding mechanism with sweep second hand, and calendar function protected by Diashock shock-resistant technology. Detailed component identification sections with factory part numbers enable accurate troubleshooting, maintenance, and repair work. The complete materials listing for all movement components serves as essential reference for sourcing replacement parts and understanding assembly requirements. Indispensable for watchmakers, technicians, and collectors maintaining or servicing this popular Seikomatic Lady movement.
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Document Details
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- Watchmaking