First time I've seen it; my reflex thought is the sharp edge of the rim gutter on the die (it's sharper than most Business strikes indicate; note how sharp the outside corners of Proofs are), combined with a bit of off-center, sliced off a piece of rim upset which wasn't where the design intended it to be, because the planchet was actually moving laterally during the moment of strike. Charge your phone.
I thought about that Dave but I think it's more of a lamination manifestation of the plating (say that 5 times fast)
Interesting ANACS slab They both are Copper Plated Zinc Cents so I imagine it is a Plating Issue Yea...charge your cellphone!
I contemplated that possibility, but the only possible common factor between the two coins presented - aside they both seem like ZLincoln planchets - is the anomaly happened at the very highest point on the side of the rim, and they're both struck by a die which wasn't centered. That made me think about what the striking die is doing when the planchet isn't centered.
Looks like a wire rim that got partially sheared off. They stick out over the field but have not been struck into it so they happened post strike.
I've seen quite a few coins with the tiny sliver from the fin still attached including small denomination gold. Never got one of those Lincoln's out of circulation for myself. They are very delicate and break away very easily. I've never seen one like Paddy's. I call that damage!
I am understanding the peeling rim, and even the thought that it could be lamination related. But, call me if I am wrong The 2017 seems to be recessed, like a void in the planchet, and not on the surface of the coin like Paddys.