Penny with errors on both sides?

I found this penny with errors on both sides and really am not sure what kind of errors they are any help would be appreciated

 

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The one side that has lincoln on is called grease filled die and is common and does not make a premium on the coin, The back side has some foreign substance wich is not a error and is a PMD or post mint damage.

 

i know it kind of looks like that but with my magnifying glass it really looks like it came from the mint like that

 

I'm with Siggy on this one! It's got some verdigris, too.

 

Agreed. Struck through grease and crapola on the back.