I have seen a few comments about these types with the mixing of the copper, thought this one was neat as it looks like a halo around Lincoln. The other stamped by someone with a connection to PA. Not priceless but unique.
Hi @GARY R COYIER. Both of your coins are post mint damage pmd for short, the 1991 looks like some sort of coin counting machine damage and the 1983 is considered a counterstamp. Counterstamps are fun to collect but no where close to being unique in a numismatic stand point. I have a few PA counterstamped Lincolns myself.
The 1991 is a very thin layer of Copper over a Zinc core. It's plated. So it is not an Improperly Mixed Alloy copper cent. Looks like damage to me.
It's a novelty counterstamp Cent. You can find them with all 50 states in different styles of counterstamps. I recently got NY
So your saying it was stored next to "something" to cause a reaction in the metal to make the rings? I don't believe it is from a coin rolling machine as it is not scratched, only has color variation. That I understand happens. Just like the look of the coins. As newbies we get way too excited about finding these, hope we not are taking up space here being annoying, appreciate your expertise.
