Do you see any type of doubling in other areas?the motto,liberty e.t.c if not then you might have a winner.
Can't be a 1980s RPM!! It's a 1988D! OK! I'm being a wise guy! I realize he meant a 1980's RPM, but I just couldn't help myself!!!
It looks like machine doubling. I do not think the hand punched D ever had a vertical back that thin. Also notice how flat the right side of the "D" appears very flat, when if a repunch would the same curved surface. It also appears that mechanical doubling affected the date and logo characters a little in "LIBERTY". Hard to tell from the photos. IMO, Jim
What's happening on the middle left side of the first 8 in the date. Has part of it been polished away? It looks pretty severe and not like anything I've seen before.