Seiko 1104A Technical Data and Parts List - 17j / 21j Calibre
Technical specifications and comprehensive parts list for the Seiko calibre 1104A mechanical watch movement, covering both 17-jewel and 21-jewel variants. This service manual provides precise technical data including movement dimensions (15.15 × 13.00 mm case, 4.30 mm maximum height), frequency (21,600 vibrations per hour), manual-wind operation with sweep second hand, and Diaashock shock resistance. The parts list is organized by assembly with complete part numbers and component descriptions. Exploded diagrams detail the barrel bridge, train-wheel bridge, ratchet wheel, escape wheel, and related subassemblies—essential reference material for technicians performing maintenance, repair, or parts identification on these movements.
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Document Details
- Format
- Pages
- 6
- Size
- 729.5 KB
- Category
- Watchmaking