what is this on old copper edges?

I have some older coppers that have uniform notches on sections of the edge
- they do not correspond to the denticles - is this something that was caused after minting (screwpressing)
or part of the design/manufacture?
or did some enterprising individuals make some punch to uniformly take off a small percentage of each copper?
- they do not correspond to the denticles - is this something that was caused after minting (screwpressing)
or part of the design/manufacture?
or did some enterprising individuals make some punch to uniformly take off a small percentage of each copper?

0
Comments
I don't know if they were minted that way or after mint messing around.
could it be part of the plachet making process?
Sorry I can't help though.
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As Sotty mentioned, it was used on several coppers of the period, including the Austrian kreuzers.
I dunno if your French piece there was made with a gripped edge (if that is the correct term) or if it's more random, post-mint markings. Either is possible, I suppose.