FHF 57-401, Winding stem
- New FHF original part, not in factory packaging.
- Thread: 0.90 mm.
- Fits cal: 57, 57-21
Technical data: FHF: 57
- 17 jewels, manual wind, sweep second.
- Size: 6.75''' 15.3 mm.
- H: = 4.0 mm.
- N: = 18.000 A/h.
- Power reserve: 40 h.
Versions:
- 57: 18.000 A/h.
- 57-21: 21.600 A/h.
