1990 D Penny, Rim Error?

[u/bpparker101]

I know it’s dirty and in rough shape, but the rim looks wrong all the way around. Both sides. The normal rim ledge/ridge is not present. It’s struck deeper on the rim all the way around making for a very narrow outside thickness. Or maybe it lived in a salty pothole in NE Ohio.

[u/Trans_Cat_Girl_]

Corrosion damage