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OMEGA Crowns, thread: 1.20 mm.

The Omega crown with 1.20 mm thread and 2.5 mm case tube is mainly for the manual wind 30 mm movements from the -40's to the beginning of the -60's.

Pre-Seamasters, crown number:

  • 30, 30T2PC: crown without logotype.
  • 265, 266, 283, 284: crown: 4502

Seamaster, Seamaster 30 crown number:

  • 267, 268, 269, 285, 286: crown: 4503, 45003, 4504
  • 269, 286: crown: 4222, 4504

 

Crown, Omega Cal 30T2 - 265, Gold, D=6.0 mm.

Crown, Omega Cal 30T2 - 265, Gold, D=6.0 mm.
Crown, Omega Cal 30T2 - 265, Steel, D=6.1 mm.

Crown, Omega Cal 30T2 - 265, Steel, D=6.1 mm.
Crown, Omega NOS, No: 45003

Crown, Omega NOS, No: 45003
Crown, Omega vintage NOS, No: 4503

Crown, Omega vintage NOS, No: 4503
Crown, Omega, Pre-Seamaster, NOS steel, D=5.5, No: 4502

Crown, Omega, Pre-Seamaster, NOS steel, D=5.5, No: 4502