Probably pointless, but this is the best I can do with my current setup. I can also see two S's on the left (not just one on the outside), one each on the inside and outside of the bottom S curve (the inside one may just be a part of one from the right side). The "S/S/S/S/S" may just be machine doubling, but it's all over the place. And the weird "die crack" on top is unknown. I might get a microscope camera and take pictures once it arrives.
If you can get yourself a Nikon Camera Body I have a NEW Old Stock Nikon Micro-Nikkor 105 mm F/2.8 Ai-S Manual Focus MACRO Lens (1455) KIT for sale.
I just purchased one of those endoscopic microscopes, so I'll see how that works whenever it gets here. I may end up getting a better camera, so I'll keep that in mind. Thanks.
I believe this to be MD. If it were an RPM then the appearance should be across the area of different mint marks of similar heights. Most of the previous photos show one high point with a tapering down each side, classic MD. I think everyone is over thinking this because of all of the different angles. A high point image with a wider base is signs of material being shaved off and away.
No conjecture. The S is effected by machine doubling plus the effects of die deterioration. The surface of the coin shows the ripply, "orange peel" effect indicative of having been struck by a worn die. While it has been clarified before, it is not a proof.
Mine looks quite a bit different from this (except maybe matching just the upper left part in isolation), but here's an example of a 1980 with a repunched mint mark. According to the linked site, however, it says it's from the Philadelphia mint... is that just a typo? Or, is there a story behind that? https://www.whitman.com/redbook/8638
Well I took some photos with the microscope camera that came in the mail today, and I hope these photos are a little better (I'm still trying to work out how to use it best). It shows staggered increases in relief (at least 3 but could be more), and an overall super high relief at the highest point (3rd photo illustrates this; through my loupe I can see it is much higher than the portrait of Susan B. Anthony at about 2x height). I don't see doubling on other parts of the coin on letters or the date, as those are sharp. Could the mint worker have repeatedly punched the mint mark into the die multiple times to get this effect? As mentioned previously, there is also what appears to be a die crack or something at the highest relief point on the MM. Thanks in advance. The first photo is with the coin upside down. If these photos aren't clear enough, I can try again.