Help me - Omega Wristwatch - Calibre and Production Year Questions

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Hello everyone,

I recently acquired an Omega wristwatch and I am trying to learn more about it. I am not entirely sure which calibre it has, but here is what I know:


Movement serial number: 3,945,861
Inside case back number: 10,482,970


I would really appreciate your help with the following questions:


  1. Based on the serial number, can anyone estimate the year of manufacture?
  2. Could this watch have a Calibre 19, or what calibre might it actually be?

  3. Does anyone know if there is any historical information available for a watch like this?


Thank you in advance!
Elias

 
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The movement number dates to approximately 1912.
The case number dates to approximately 1943.

Without knowing the diameter of the movement it's hard to say what caliber it is as many of them differred only in size, but it appears to be too small for a caliber 19 (42.3mm diameter).

The whole thing is a bit of a mystery.
 
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Perhaps a small PW/pendant-watch movement, later put in a WW case.
 
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The movement number dates to approximately 1912.
The case number dates to approximately 1943.

Without knowing the diameter of the movement it's hard to say what caliber it is as many of them differred only in size, but it appears to be too small for a caliber 19 (42.3mm diameter).

The whole thing is a bit of a mystery.
Thank you very much for your help, I really appreciate you taking the time to look at the watch and share your thoughts.
It has been very helpful for me.


Best regards,
Elias