Crown, Omega Seamaster, diam: 5.0 mm.
- OMEGA original steel crown for Seamaster watches, here pictured on a 135.012 Seamaster 600 case (not included). NOS without packaging.
- Diameter: 5.0 mm.
- Thread: 90
- Fits Seamaster and Genève cases with case tube diameter: 2.0 mm.