I see the curve, but it can't be a clash, nothing is curved on the reverse die, rim is formed by die edge. Only thi ng can think of is what's called a partial clip, where planchet stock bar is an incomplete punch thru...but you should see some indication on reverse also I thought?

If you were thinking an angled die MAD colliding w/ reverse die the resulting punch on coin would be raised perhaps?
Edited by Crazyb0
07/17/2017 11:53 pm