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First, I have no idea why they call it a frog. I can only hope the Swiss of olde didn’t use actual frogs to polish metal since I can’t see that ending well for the frog. Either way I found this one with the parts fixture included. You often see these with holes or notches filed into them for polishing screws. Old watchmakers would have something to say about that I’m sure and no such abomination will be performed on this one.

So far it’s only been used for a setting spring for a Gruen/Aegler which was a clients watch, so no photo’s.

Black Polishing Frog

Black Polishing Frog

Black Polishing Frog

Black Polishing Frog

Black Polishing Frog

Black Polishing Frog

After cleaning and removing olde frog sweat. Since details of making these are sparse I’ll add photos with measurements of the individual pieces. This should help anyone who wishes to make one for themselves.