![ETA 2412-770, Mainspring](http://urdelar.se/cdn/shop/files/0000_1_c5048c7c-2dac-4b98-94ae-049d59a9fd59_{width}x.jpg?v=1701008354)
ETA 2412-770, Mainspring
- PRIMA mainspring in factory packaging.
- Fits cal: 2412
Technical data ETA cal: 2412
- 17/19/21 jewels, manual wind.
- S: = 6.75''' 15.3 mm.
- H: = 3.40 mm.
- N: = 21.600 A/h.
- Power reserve: 44 h.
- Mainspring: 1,35 x 6,5 - 0,075 - 210
Versions:
- 2410: 18.000 A/h.
- 2412: 21.600 A/h.
- 2425: automatic wind, 18.000 A/h.
- 2428: automatic wind, 21.600 A/h.