I can see why it's not often seen, I can barely make it out even looking at the one listed and with identifying marks. http://www.coppercoins.com/lincoln/diestate.php?date=1946&die_id=1946d1mm010&die_state=lds
Rock I sent the photo in to Bob/@ coppercoins.com this one is the only MS grade 1946-D/D RPM#10 listed by any TPG,Pcgs or Ngc has no listing for one or or I can find listed.