Very strange penny

Hello this penny is a 1958 D and it is very rough with shiny flecks like diamonds there is also some black stuff on it
Part of the on e in the date is missing and it looks like the tail of the five may be coming up from the penny
Any help on this would be appreciated

cynthia

 

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PMD and what looks like it was in the ground or maybe in contact w/ some type of acidic compund

 

That looks like a ground find to me. It is both corroded and otherwise damaged.

 

Thank you for your reply I was thinking maybe acid too or maybe coke but I am sorry I don't know what PMD means

cynthia

 

PMD = Post Mint Damage

 

Oh thank you very new to this

cynthia