1973 Omege Genève 166.0173 - The search for the original crown

Hi everyone, I am restoring the watch and i can't seem to find the original crown that belonged to this particular model.


I came across different informations regarding the original and the Service replacement crowns, would somebody help me out on this one + the correct stem?




What i found: crown 42527 --> Service replacement crown, would fit.
Crown 069ST42052 --> Service replacement crown, would fit.

Thank you!