I have been going through a 50$ Bank Bag of Lincolns, some have been Wheats, but the majority 75% has been 82's and earlier. This is one of the zincolns. I am not sure if this cud is related to the die or the collar, and well frankly I want to keep searching the bag, Any help would be appreciated. Phil
I don't know whether it is a cud or not but here is a link to over 40 plus cuds on 1984 cents: http://cuds-on-coins.com/lincoln-cent-cuds-1984/
No. That's not a CUD. It's a bit of a folded over Finned Rim caused by a high pressure strike on one side due to a Misaligned Die Strike. Simple.