ETA 988.331 Technical Data – Movement Specifications and Hand-Fitting Instructions
Technical service manual for the ETA 988.331 quartz movement (Ø 22.00 × 25.50 mm, 9 3/4" × 11 1/2"), covering complete movement specifications, precision hand-fitting procedures for hour and minute hand installation, step-by-step electrical testing protocols with exact measurement points, technical schematics of the electronic module and digital display assembly, parts reference data, and caliber compatibility information for watchmakers and service technicians.
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Document Details
- Format
- Pages
- 11
- Size
- 4.7 MB
- Category
- Watchmaking