Well, one thing that occurs to me is the lettering on the edge. If it's missing around the curve, then obviously it is worn or ground off. If the lettering is stretched around the side, that's probably slow acid or the Tesla coil shrinking thing.
Edit: I think I just realized what was confusing me about the first pic. The undersized cent is sitting on top of the normal cent. I thought it was one coin with the rim intact on the front. Although it looks intact on the reverse, is that pic also on top of another coin?
Edited by Brandmeister
08/22/2023 8:57 pm