Tried to take photos at angles to show it's not push-over from the rim. No damage on the rim next to the tiny cud. 1982 Lg. Date Copper.
Looks like a slight misaligned strike that caused a slight finned rim. Might be folded over copper.. IMHO
How can I confirm without destroying it? Thanks! I had a coin before with a finned rim that was loose and broke off.