FHF 81-401, Winding stem
- FHF original winding stem, not in factory packaging.
- Thread: 0.90 mm
- Fits FHF cal: 81, 81-2, 82, 82-4, 811, 811-2, 821, 821-4
Technical data: FHF: 81
- 17 jewels, manual wind, sub second.
- Size: 11.5''' 23.3 mm.
- H: = 3.5 mm.
- N: = 18.000 A/h.
- Power reserve: 45 h.
Versions:
- 81: 10.5'''
- 81-2: 10.5''' date.
- 82: 10.5'''
- 82-4: 10.5''' date.
- 811: 11.5'''
- 811-2: 11.5''' date.
- 821: 11.5'''
- 821-4: 11.5''' date.