Special characteristic
ETA 7750 Movement
After the takeover by ETA, the Valjoux 7750 was re-named the calibre ETA 7750. This is quite possibly the most successful automatic chronograph movement of all time. The calibre stands out due to its high degree of accuracy and robustness. It has 25 stones, a ball bearing mounted rotor and a uni-directional winding mechanism. The 7750 has a 1/8-second counter, a 30-minute counter, a 12-hour counter, 28,800 half oscillations per minute and has a power reserve of ca. 44 hours. The loss of accuracy is 1-6 seconds per day. Movement revisions are recommended every 3 to 8 years
- TOP Execution
- Chronograph mechanism with cams
- 2 push buttons
- Self-winding mechanism with ball bearing
- Hours, minutes, small second
- Stop second device
- Regulator system ETACHRON and regulator corrector
- 28.800 vibrations per hour; 4 Hz
- Chronograph 60 seconds
- 30 minutes and 12 hours counters
- Date and day, corrector
- 25 Jewels
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