I don't do errors or varieties and can't respond educationally to the OP. But I am tuning in to this thread. I am interested in this one.
It's DDO-007. I like when people post actual errors/varieties in the forum http://coppercoins.com/lincoln/diestate.php?date=1972&die_id=1972p1do007&die_state=eds
I was hoping someone would be holding it, while I was vacationing from the proceeds, but I guess it will just have to go in a 2x2 and put it in the box with the others.
Every day I pass by so many new threads about doubled everything. I am glad I didn’t pass this one by. Way, way cool find. Congratulations to ya.