Omega 23.4 (220), Main spring, no: 770
Tax included.
- Manufacturer: Prima, no: 140 K 31
- Fits cal: 23.4, 23.4SC, 24.4SCT1, 23.4T2, 220, 230, 231
- H: 1,40
- D: 9
- F: 0,095
- L: 310
Versions:
- 220: (23.4 until 1949), sub second.
- 230: (23.4SC until 1949), center second.
- 231: (23.4SCAM until 1949), center second, antimagnetic.