Posted 03/03/2021 7:03 pm
This is actually neither, but rather split plating doubling. Proof coins are struck twice (maybe it's more complicated than that; correct me if I'm wrong) and under higher pressure, which can cause the plating on zinc cents to split around the devices where the surface has to flow across a large surface area. You'll also see it on errors like broadstrikes and some normal, well-struck cents. I believe proof cents have a thicker plating to avoid this problem, but it still happens.
If it was mine, I'd use it at one of the self-check out stations and Target or 
