Felsa 390-440, Spring for yoke
Tax included.
- FELSA original part in very good used condition.
- Fits cal: 390, 391, 394, 395, 399
Data Felsa/AM 390
- 15/17 jewels, manual wind sub-second.
- S: = 12''' 26.6 mm.
- H: = 3.85 mm.
- N: = 18.000 A/h.
- Power reserve: 45h.
- Mainspring: 1.70 - 10.5 x 0.12 x 320