Hello, Sorry about the title, but that was the best I could do!!!! I bought these at an estate sale from a neighbor, rumor has it that he or a relative did piano/organ , repair /tuning. The smaller piece is unmarked, the larger one is stamped F B Rogers, could be an owner's mark, although all of the stampings are consistent in length & spacing. I tried to find some info on these with no luck. Thanks, Lou

How about a flat belt lacing jig?

Hello, Oldgoaly. The guy had a wide array of tools, nothing to indicate a use of leather belting, but there were a lot of piano/organ parts.Thanks, Lou

Hello, Oldgoaly. I will look into the flat belt lacing jig idea!!!!! Thanks, Lou