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10 BNCH ( A17 military )

Submitted by tikimatt on January 21, 2019 - 10:43am

Hi, i'm looking for a ratchet wheel for my  10 BNCH  type A17 ( MIL W3818 )  watch. I didn't find any in the market ( ebay etc..) Do you know if there is compatibility or interchangable pars for ratchet wheel with other bulova models?



Reverend Rob
Posted January 22, 2019 - 1:58pm

The 10BNCH is not from an ebauche and according to BesFit, is not interchnageable with other Bulova movts. Our own Bulova Interchange Catalague does not list it.

That said, this is a very basic part, and I would suggest trying a few from similar 10 1/2''' movts to see if any fit. If they do, let us know, because very little info exists as to this.

Posted January 29, 2019 - 4:07am

In reply to by Reverend Rob

Thanks so much Reverend Bob. I've found 10CBAC and 10CMC ratchet wheel for sale? i think i will try.

Posted April 4, 2024 - 9:13am

Same dilemma, the ratchet wheel for the 10BOAC is compatible with the 10BNCH....  from what I've read. 

I'm going to try it, no guts, no glory. 


Posted April 9, 2024 - 4:05am

I am also being told the 10BP uses the same barrel and ratchet wheel.  

Posted May 1, 2024 - 11:40am

In reply to by FifthAvenueRes…

My watchmaker, He's Bulova trained, is currently replacing the ratchet wheel on a 10BNCH with one from a 10AN, says they're the same.   

Posted May 3, 2024 - 3:21am

a 10AN ratchet wheel is a proven replacement. 


My 15J 10BNCH is back up and running 100%, thanks to Mr. 10AN.