I come across this unusual quarter. I don’t know what’s wrong with it but it’s odd looking. Maybe someone has an idea as to what happened to it.
It's just damaged of course, maybe acidic material and banged around a bit. Post Mint Damage. Might be the elusive dryer coin.
I call it DEFDAM - Definitely Damaged It has had a rough life. All you need to know is that it's not a mint error of any kind.