1955 Omega Crown

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67whitegoat

·Jun 21, 2022

Hi guys.
I have purchased a 1955 Omega 37mm with 266 movement. It is a 2181-8 case. I am trying to pin down the correct size for the crown. Mainly the Tap size.
Any helpful information would be greatly appreciated.

 

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67whitegoat

·Jun 22, 2022

P.S.....Ranfft states the stem is a W621.

 

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mac_omega

·Jun 22, 2022

stem diameter 1.2 mm

you can find them on ebay for little money

Edited: Jun 23, 2022

 

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67whitegoat

·Jun 23, 2022

Thanks Mac. Are they all basically the same thread tap?

 

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mac_omega

·Jun 23, 2022

6 67whitegoat

Thanks Mac. Are they all basically the same thread tap?

cal 266 has only one tap size, thread for crown is always 1.2 mm

 

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67whitegoat

·Jun 23, 2022

Very good. Can you possibly tell me the tap size?

 

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67whitegoat

·Jun 23, 2022

I believe i found it. Tap 7. Thanks Mac. I knew someone could help.
Cheers!