1956-D RPM-1MM-010 is my best guess. Pic on coppercoins isn't exactly like mine but both have "D" showing South. I swear the more i look at mine, it looks like there may be 3 D's. (Or maybe its time for a break) Sure appreciate the advice. Thx!
Sure. It could be a new one, they're finding these periodically. There's no such thing as "close enough" in these, though, they match or they don't.