Seiko 2220A (24j and 17j) Watch Caliber Parts List and Technical Data
Seiko 2220A mechanical watch caliber parts list and technical data covering both 24-jewel and 17-jewel variants. This documentation provides detailed component diagrams with factory part numbers for the complete movement, including the barrel, train-wheel bridges, wheels and pinions, escapement assembly, regulator, setting lever mechanisms, and balance staff. Technical specifications detail a 17.20mm case diameter, 3.30mm thickness, operating frequency of 28,800 vibrations per hour, manual-wind (non-automatic) configuration, micro-adjuster capability, Diashock shock protection, and Diafix oil lubrication system. The manual includes mechanical assembly drawings with step-by-step references and practical notes on setting lever installation and operation, plus cross-references to broader caliber 2220A workshop documentation. Essential reference for technicians performing caliber maintenance, component replacement, or movement servicing on Seiko mechanical watches using this movement.
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Document Details
- Format
- Pages
- 2
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- 270.8 KB
- Category
- Watchmaking