Seiko 7F38A, 7F39A, 7F68A, 7F69A Parts Catalogue & Technical Guide
Parts catalogue and technical guide for Seiko quartz watch movements 7F38A, 7F39A, 7F68A, and 7F69A. Includes complete movement specifications table with dimensions (Ø24.0 mm casing diameter, 2.9 mm height), movement features (step motor with load-compensated driving pulse, 24-hour hand, dual time function, moon phase hand, day hand, date hand, instant lunar calendar setting device, instant calendar setting device, train wheel setting device, electronic circuit reset switch, and battery life indicator), technical parameters (monthly rate less than 15 seconds at normal temperature, 3 jewels, SEIKO SR916SW or Maxell SR916SW battery with approximately 3 years life at 1.55V), and illustrated parts breakdown showing case assembly components, dial, hands, moon phase indicator, and winding stem details.
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Document Details
- Format
- Pages
- 10
- Size
- 280.6 KB
- Category
- Watchmaking