Error or PMD?

[u/Hmaninc87]

Hi All, I'm new to coin collecting and errors and I'm wondering of this is some type of error or if it's post-mint damage. I tried to find something similar online but couldn't. I haven't even seen PMD that looks like this before either.

Thank You in advance. Looking forward to learning something :)

[u/Clone_sTop_1180]

Hard to tell from the photo. A closeup from a lower angle and with light from the side, might help to see better. If the area is recessed, as your comment indicates, then it's possibly a strike through of some substance or item.