I found this 1945 where penny And just to the bottom of the 5 there is another 5 or possibly S mint mark .....I'm not sure exactly what it might be so I shared it here to get some opinions on this penny....
Just the shape of the metal combined with the stain that gives it that appearance. A little imagination helps as well.
It might be like @Collecting Nut said too. If you don’t believe him, hang onto it, it’s only a cent. There might be more, no one knows for sure. Just think if you had two. I don’t know anyone who has two.
Would this be a coin that you might bundle with some more and possibly send it to ngc in a package deal
Not to me it wouldn’t. I think sending this coin in is a waste. A waste of time, money, effort and energy, a complete waste.
If you want to waste your money. They won't even tell you it's a carbon spot, they'll just grade it and charge you.
All the members here give you good advice. If you have money to throw away, just go to ‘Want lists’ section. We all have tons of real errors to sell you. And varieties