1988 mint mound?

this penny is in really bad shape but I had to put it on here for the date and mound of copper around it

 

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That is from the zinc deteriorating underneath the copper plating. Very commonly seen, but that is a big one!

 

it's keeper just cuz it's a big zit on mm.

 

That's a "zinc zit"....common on these cents.

 

I call this a "Napoleon" coin because the copper has been "Blown Apart".

 

Really???