Are all the pictures yours? I can see some of them possibly matching: http://coppercoins.com/lincoln/diestate.php?date=1939&die_id=1939p1do001&die_state=mds
I am only going off the thing over the "9" in the date. That is the only thing I can see as possibly matching the DD on copper coins. That being said, I wouldn't recommend cleaning anything. You'd kill all value, if there is any actual value.