Omega 300 (R 17.8), Main spring, no: 770
Tax included.
- Manufacturer: Prima, no: 130 J 29
- Fits cal: R17.8, 300, 301, 302, 310, 311
- H: 1,30
- D: 8,5
- F: 0,09
- L: 290
Versions:
- R17,8: sub second, rhodium plated bridges, to 1949.
- R17,8AM: sub second, antimagnetic, rhodium plated bridges, to 1949.
- R17,8SCAM: center second, antimagnetic, rhodium plated bridges, to 1949.
- 300: same as 17,8, sub second, rose gold plated bridges, from 1949.
- 301: same as 17,8AM, rose gold plating, from 1949.
- 302: sub second, incabloc.
- 310: same as 17,8SC, from 1949.
- 311: same as 17,8SCAM, from 1949.