Well, the reverse typically has METENSIS around the cross, which looks ok (more or less).
The trick is obverse. If the letter at 2:00 is an I, we could have the beginning of IACOB (Jacques) or IOHAN (Jean).
… unless the name begins at 6:00.
Not too different from this: https://www.acsearch.info/search.html?id=7632700 , maybe lacking the stars in the corners, but possibly the same bishop.
I don't have Flon, and I don't think we have a member here who does.
We should also somehow get the attention of the VERY knowledgeable guys on the French side of Numista (there is already another question about a Metz denier over there).