Looks like a die crack or an unusually big lamination.
What does the reverse look like?
Rev. looks normal to me...
Also add a cud (rim).
Lamination above 19? A lot of crud on the coin but can you slide a piece of paper under that “flap” above 19? Don’t force just would make a nice photo op.
Interesting and I would keep it.
Okay cool, then it is something that actually happened at the mint.
Delamination... but there is also handling effects....Cheers, RickO