Genuine OMEGA Speedmaster Cronograph crown 5.5 mm for 2.5 mm tube, steel
Dimensions:
Diameter: 5.5 mm
Height: 3.75 mm
Thread: 1,2 mm
Suitable for 2.5 mm tube diameter
Suitable for models with the following reference numbers:
175.0081, 175.0082, 175.0083, 175.0084, 175.0086, 175.0087, 1750083, 178.0055, 178.0057, 178.0060, 178.0066, 178.055