Opinions please Environmental damage or could this have happened at the mint? It is as if a layer is coming off the obverse of the coin. The reverse does not have this.
He’s only joking but remember, Lincoln was under a lot of stress throughout his presidency, especially the night he was shot. Lol
Kind of depends on how you define "damage". Copper based coinage tends to form a layer or deposit on the surface which is kind of "spongey" probably due to the formation of oxides. You see this very often in ancient coins and sometimes in not so ancient.
