• Apprentice
    6 Apr 2025, 12:28 p.m.

    Hi all 

    I recently purchased this IWC Cal 853 and went on to service it , at disassembly when I removed the oscillating weight one of the jewels broke (maybe it was broken before idk)

    I don’t have the knowledge or tools to find and install a new jewel , so I went to my local watchmaker , he didn’t have a correct jewel and he can’t measure the jewel size .

    The watch is currently at my watchmaker so i couldn’t take a picture of the broken jewel but i added a photo from a Cal 854 which I’m working on .
    The broken jewel is the one on the underside of the oscillating weight , the one that sits on the little plate connected to the weight .

    If anyone here knows the jewel size , or have any idea how this could be fixed , would help me a lot .

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