one of the reverse. might help On the first photo where it reads United States is the lip and the spot where the damage is.
It's an error. Looks like either a struck coin or a blank planchet was in the chamber with the coin during striking. It's either an indent or a brockage depending on if there is any design transfer in the effected area. Most likely an Indent.
Pmd=what? PMD=WHAT? Time to spell out the truth folks. PMD=WHAT? Pre Mint Damage Post Mint Damage Per Menstrual Damnage Pre Mental Decay Post Methodical Deceit Spell this out!