Minerva 13-20 chronograph movement repair

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Someone had this bright idea making a Minerva 13-20 into a Breitling and sold on eBay for £250. Well, it’s “Breitling” expensive but still the cheapest Minerva I can find.

As a typical problem of this movement, the brake/hammer holder is missing. Since every one is missing this part it wasn’t possible to buy it, and I have to make one myself.

unlike most other chronograph arms that requires high tolerance, this part isn’t really matter that much and there isn’t any adjustment screw for it…

Minerva 13-20 chronograph movement repair

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