1984 Lincoln Penny Double Die? Or Something else? Then, take a look at the last picture and tell me what is going on next to Lincoln’s neck.
I believe this is a case of Die Deterioration Doubling. Die Deterioration Doubled coins have no added value and they are not considered errors. https://doubleddie.com/144843.html Also, see the ridge near the rim by "IN" and the "G" of "GOD"? That is also caused by a worn out die and is known as a ridge ring.
Honestly, I'm not absolutely sure. I'm pretty confident that's not a DDO. It might be a stain, a plate blister or more signs of a worn die. @paddyman98 should be able to help us.
No, that is Split Plate Doubling. The doubled look is caused by the copper plating peeling back exposing the zinc underneath. There is no added value to this kind of doubling. It is not an error.
It's definitely not a Doubled Die Variety. Anna. That's die deterioration doubling. Considered worthless doubling. Also.. the correct numismatic terminology is actually Doubled Die. Not double die. There's a difference.