Certina 13.22-770, Mainspring
- CERTINA original mainspring in factory sealed packaging.
- Fits cal: 13.22
Versions:
- 13.20: N: = 19.800, no mountings.
- 13.21: N: = 19.800, mounting threads.
- 13.22: N: = 21.600, mounting threads.
Versions:
