Looks like PMD to me for a couple reasons: the line of damage extends to the rim and a little of the metal from the bottom of the letter D seems to have been "smushed" up into the middle of the letter.
"If you climb a good tree, you get a push." -----Ghanaian proverb
"The danger we all now face is distinguishing between what is authentic and what is performed." -----King Adz