Possible Error 2014 Cent

[Superlue]

I have spent alot of time researching this potential error but I can't find anything.
There is a perfectly round dis coloration above the date. I did not try to clean it but I did rub it with my fimgers because I thought it was a spot of dirt, and it did not come off at all and I could feel depth not thickness. Can anyone out help me out?

Thanks

 

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[Dozer D]

Maybe some drop of an acid.

 

[galenrog]

My default opinion for such discoloration on copper plated zinc is environmental exposure. A small drop of anything that could have even a minor reaction to the thin copper plating will make such a mark. A drop of heavily chlorinated tap water could easily leave such discoloration.

Time for more coffee.

 

[Superlue]

Dagnabbit I thought I was rich, thanks for the help!

 

[huntsman53]

Looks like blood.

 

[A2coins]

Good to ask ya never know