1977D Lincoln cent 0

[Jonescoins]

You're so found his 1977-d Penny  . Very odd coloring D / D over S covering mint mark.can anyone tell me about this coin has anyone seen something like this that look like it's on a different coin planchet well I appreciate all reply to response to thank you

[Greenstang]

Your coin is suffering from environmental damage.

We will need a larger clear close-up of the mm before making a decision as to it's status.

 

[Jonescoins]

Ok thanks 👍 an I will take some close up

[Coinbuf]

There are no known RPM/OMM's for this date, your coin looks to have spent some time in the ground and is environmentally damaged.

[Kirt]

Before you spend a lot of time trying to get a better close up -- some friendly advice. Even if the coin had a D over S mint mark, it is badly damaged. That will make it extremely difficult to tell if there is in fact a D over S, and will substantially impact the value...not in a good way.

[Jonescoins]

Oh ok 👍. what makes them turn that way? also thank you

[Kirt]

11 hours ago, Jonescoins said:

Oh ok 👍. what makes them turn that way? also thank you

Copper is pretty reactive. In moist soil, the water accelerates corrosion. The amount of corrosion depends of course on the composition of the soil and the amount of moisture. That's one way -- and the most likely way --  to get a coin with a surface like yours. 

My own question about this is that some cents found in soil corrode like this one did, and others develop verdigris. I have yet to see an explanation for why that happens!

Edited March 25, 2020 by Kirt