Omega 340-1106, Winding stem
- OMEGA original stem, without factory packaging.
- Thread: 0.90 MM.
- Fits cal: 340, 341, 342, 343, 344, 350, 351, 352, 353, 354, 355
Versions with sub second from 1949.
- 330: D=30,10, shock protected, antimagnetic, H=4,55 mm.
- 331: D=30,10, centenary chronometer, antimagnetic.
- 332: D=30,10, antimagnetic, redesign 331.
- 333: D=30,10, exenter regulator, chronometer.
- 340: D=28,10, shock protected, antimagnetic, H=4,80 mm.
- 341: D=28,10, centenary chronometer, antimagnetic.
- 342: D=28,10, shock protected, antimagnetic, redesign 340.
- 343: D=28,10, exenter regulator, chronometer.
- 344: D=28,10, swan neck regulator.
Versions with center second from 1949.
- 350: D=28,10, shock protected, antimagnetic, H=5,40 mm.
- 351: D=28,10, shock protected, antimagnetic, redesign 350.
- 352: D=28,10, exenter regulator, chronometer.
- 353: D=28,10, shock protected, antimagnetic, date, H=6,10 mm.
- 354: D=28,10, swan neck regulator.
- 355: D=28,10, date, redesign 353.