
ETA 2640-721N, Balance, complete
- New ETA original balance in factory sealed packaging.
- Fits cal: 2640, 2641, 2648, 2650, 2651, 2658 with 21.600 A/h.
Technical data ETA 2640
- 17 jewels, manual wind, sweep second.
- S: = 7.75''' 17.2 mm.
- H: = 3.50 mm.
- N: = 21.600 A/h.
- Power reserve: 48 h.
Versions: 7.75'''
- 21.600 A/h. 28.800 A/h.
- 2640: manual wind 2660: manual wind
- 2641: manual wind, date 2661: manual wind date
- 2648: manual wind, day-date 2668: manual wind, day-date
- 2650: automatic 2670: automatic
- 2651: automatic, date 2671: automatic, date
- 2658: automatic, day-date 2678: automatic, day-date
Versions: 8.75'''
- 2681: automatic, date
- 2688: automatic, day-date 2685: automatic, date, moon-phase
- 2691: manual wind, date