I think it's an rpm but I am looking for a second opinion. I looked at variety vista and it looks like RPM-001 D/D East.
I don't think it's the 1984-D RPM-001, it's closer to 1984D-1MM-004 http://www.coppercoins.com/lincoln/diestate.php?date=1984&die_id=1984d1mm004&die_state=mds