1986-D/S

[Kevin Simpson]

                      What do you experts think of this? Just appears to be D/S? I'd like your input. I know that this is not feasible just an oddity but I think that it is an interesting coin. I would like to clean to get a better view of it it but I'm afraid of what it may do to the coin. I was always told not to clean coins with anything.  

[GW]

No record of that error. 

https://www.ngccoin.com/variety-plus/united-states/cents/lincoln-cents-memorial-reverse-1959-2008/

 

[Conder101]

Appears to be the result of zinc rot and pareidolia.

And a D/S would pretty much be impossible because starting in 1985 the S mintmark was on the master dies (possibly on the master hub) so a die hubbed for a proof would have to get mixed in withthe blank dies and then the guy punching in the mintmarks would have to grab a die he expected to be blank, see that it already had a mintmark, and then decide to overpunch it anyway.  Not very likely.

[jgrinz]

Definitely looks altered anyway by the discoloration - by happenstance or on purpose

 

[Mohawk]

5 hours ago, Conder101 said:

Appears to be the result of zinc rot and pareidolia.

And a D/S would pretty much be impossible because starting in 1985 the S mintmark was on the master dies (possibly on the master hub) so a die hubbed for a proof would have to get mixed in withthe blank dies and then the guy punching in the mintmarks would have to grab a die he expected to be blank, see that it already had a mintmark, and then decide to overpunch it anyway.  Not very likely.

Agreed with all points made by Conder.

[Kevin Simpson]

                     Thank you for the info. I didn't think it could be anything but needed your input. So it wouldn't hurt if I tried to clean it with acetone, am I correct? Thank you again.