Crown, Omega Seamaster 300 Professional, no: 42123
- OMEGA original screw down waterproof crown in stainless steel.
- Comes in factory selaed packaging.
- Omega part number: 069ST42123
- Diameter: 5.50 mm.
- Winding stem thread: 0.90 mm.
- Fits case ref: 168.1503
- Matching case tube: 090ST4201