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Posted

Hi!  I have an Omega pocket watch which I'd like to fix.  I'd like (among other things) to know the caliber.  Here's what I've found on the movement and case:

 

  1. 5119180 which I presume is a serial number.  It is consistent with a database of serial numbers I found which would date the watch c.1916.  This number is stamped on both the plate and the train bridge.
  2. The last 4 digits of the serial number—9180—occur are stamped on the underside of the balance cock and the barrel bridge.
  3. There is another number on the plate: 26513.  I don’t know its significance.
  4. The case is a S.W.C Co. 14 kt, gold filled, 25 year case with serial number 4797529
  5. Judging from the engraving inside the case back, a lot of watchmakers have serviced the watch.  One of them engraved 460L on the case.  Now this could be a transposition of 406L.  I did find that Omega made a 40.6L caliber and the first picture looks a lot like the movement in my watch.  Mine is 17 jewels, not 15.  Also the movement in my watch is nickel(?) plated, not plain brass.  The logo on the train bridge is different than what’s on my movement.
  6. The second picture shows an Omega movement that looks almost exactly like my watch; only mine is, as I said 17 jewels.  Mine also has OMEGA WATCH Co SWISS, 17 JEWELS ADJUSTED, 2 POSITIONS on the train bridge--just as shown in the second picture.

Can anyone tell me what the caliber of my watch probably is?  I don't have a picture of my watch because I've taken it apart.

 

 

Doug

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Posted

Without measurements id say your looking at one of the following >

 

19"' Variant

40.6 Variant

or possibly a Cal 142 

 

The 19"' variants came in 7,15 & 17 jewel formats, the movement plates are made from brass with a nickel plate ( so do not polish at all ). Hard to say exactly which it is without knowing dimensions.

 

The numbers on the dial side ( 26513 ) refer to the Depose number ( or patent number if you like ), there is usually a cross next to it also. 

 

From the amount of these i have myself id say its a 19"' or 40.6. Nice simple and effective timekeepers :)

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