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Discussion Starter · #1 ·
Can anyone provide information on this pocketwatch movement, i.e, Calibre, when introduced, characteristics, etc.

Any information would be appreciated.

Thanks in advance.

 

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You have a caliber 19.75N - a 15 jewel movement introduced in 1908 which was used into the 1930's (or later). The serial number dates this particular movement to 1918. It beat at the standard 18,000 bph and had a Breguet overcoil hairspring.
 

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Discussion Starter · #3 ·
Thank you for the reply. I had thought it was a 18.69N based on what I could find. What is the difference between the 19.75N and the 18.69N?
 
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