I see distortion on the left side of the column that leads me to think PMD but I don’t see enough else to call it without better images. It’s an intriguing shape and pattern/texture. Kinda looks like I little stone got in the mix. Reed. P.s. Nice catch!
IMO it's PMD. Looks like it was hit and pushed metal up to the right somewhat making the column over the area look like it is raised or swelled.
I would hang onto it for the nonce. Even though there appears to be pushed metal from a hit, if it were a large enough piece of metal or broken off piece of die that it was struck through, it would push the metal around to some degree. Not saying it is struck through, maybe just get another opinion of it with it in hand from a dealer maybe.
