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Posted

Hi,

I’m looking to replace a balance on an FHF 30 (non incabloc) which has a bad hairspring. 

There are hardly any available for sale, so I wondered if any of the other FHF balances might be compatible?

I note that the staff size is interchangeable between some calibers which is what prompted me to ask. 

Thanks. 

Posted

Rannft lists many similar calibers, but there’s no clear details regarding what the differences are. 

Posted
28 minutes ago, StuartBaker104 said:

According to Jules Borel, just FHF 31 and Benrus AJ are equivalents

Ah, thank you. I did look on the JB website,

but clearly not in the correct section. 

Posted

Have a FHF 30 here somewhere. But not sure that the hairspring is okay. The FHF 30 was used by Rolex and that is why they are rare. Rolex 59. 

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