i just got into finding error-ed coins and such, like quarters and I have a bunch with the same mark but i think its from a coin rolling machine but idk I tried looking it but couldn't find anything so I figured I would ask you guys
i work at an arcade to so i see a lot of quarters if there are any other cool ones to find let me know i only really know about the silver quarters
any time you see arcs like that, immediately think coin rolling machine. They may go through letters/numbers and displace metal while doing it too. So it may also create additional damage other than the scrap. With manual ones one can create some pretty deep looking gouges.
I see a lot of posts like this where the poster thinks that error/pmd is a crap shoot. If you learn the minting process, you can logically deduce whether or not what you see was done during the minting process. In this case, you see two gouges that dig into the metal and move the metal around. When a coin is struck, it is crushed down, so it should have no raised ridges from surface metal movement. Therefore, the gouges here must have happened after the coin was minted.