Balance and hairspring interchange

Submitted by toothsls on August 19, 2022 - 8:54am

Is there a source of info on Bulova interchange between different movements?    I am presently looking for a hairspring or complete balance assembly for an 11AF movement.  

Geoff Baker
Posted August 20, 2022 - 9:26pm

Search eBay, using the movement number

Posted August 21, 2022 - 1:50am

I agree with Geoff, your best bet is to jump on eBay and search for "bulova 11af balance". You should find at least one result.

Reverend Rob
Posted August 21, 2022 - 1:16pm

The family this 11 1/2''' movement belongs to was made from 1959 to 1969 and had several styles of Balance. (screws, no screws) They are all based on a smaller ebauche, (10 1/2''' BZ series) but to be safe, find a movement that is as close to yours as possible from say, a non-running example on eBay as mentioned. 

Reverend Rob
Posted August 22, 2022 - 1:46pm

Correction- That should have read: made from 1959 to 1967. 

Posted August 29, 2022 - 9:37am

There are always several books for sale on eBay every week. It's called the Bulova book of inter-changeability. You can pick one up and it's a great reference for parts interchangeability.