Lamination error? Lincoln penny

[aferdita1987]

My dad found this 1988 penny today - thought it was pretty interesting.

 

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[Dihren]

Whats the other side look like?

 

[Carson Coin Master]

It honestly looks like some kind of crud like glue or something on the surface of the coin. I don't think it's a lamination error. here are some examples.