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Hello
Yes indeed French marks can be tricky, made even trickier by your out-of-focus images.
The top mark, CB under a Croix de Lorraine with a crescent underneath is from the Nancy jurisdiction, specifically Mirecourt, dating to the late 18th C.
See Tardy, p. 164, second row.
As for the maker’s mark, some other kind member might be able to decipher that.