The MM on this 82d looks odd,I cant put my finger on it. It looks like a D over an S at first glance. It doesn't match any of the rpm for this date
You are looking at a large date 82D with some sort of junk/corrosion/god knows what near the mm. Nothing more.
okay, so try to move it higher, then focus in a tad more...turn the mic lights way down, and supplement it with true white light. It should look like my avatar photo....
"ZINC HOLE!!!" Love it! New numistitastyatical term lol! Nothing is worse then when Denver falls in a zinc hole. BTW, I would totally 2x2 that one fo sho!