Thanks for responding, I agree this appears like PMD but I am not seeing any Pushed, Plowed, or Piled metal indicating it as such. I don't see the zinc core exposed on these marks either.
"Pride is yoked with callous behavior, as humility is with compassion." St. Gregory Palamas
It is most unusual. But the indent seems to be very very small. So something made a slight, and very careful impact that allowed no metal to be pushed aside, and allowed there to be a rising of metal on the other side.
However, it is still most likely PMD, no matter the uniqueness of it.
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