ETA Caliber 2550 2551 Technical Data and Parts Illustration
Technical data and parts reference for ETA caliber 2550 and 2551 automatic watch movements manufactured by ETA S.A. in Grenchen, Switzerland. The caliber 2550 is a lever-escapement self-winding movement with direct-sweep center seconds and 21,600 vibrations per hour. The caliber 2551 adds an instantaneous date display with quick-set capability for rapid date correction. The document provides complete technical specifications with all dimensional measurements in millimeters, detailing the cage, escapement, balance wheel, staff, mainspring, braking spring, hour wheel, date-setting mechanism, dial, and other essential components. Page 2 features a comprehensive exploded parts illustration with numbered reference diagram identifying all mainplate components and individual parts for the caliber 2550. Essential reference for service technicians, repair specialists, and movement builders working with these ETA movements.
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Document Details
- Format
- Pages
- 3
- Size
- 4.8 MB
- Category
- Watchmaking