Coin_Surfer
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I was looking through a box of pennies and saw the back first. I flipped it over slowly and saw the year. 1881 
We are wondering what the blue/green stuff is. Does it come off with anything like soap in water? I don't want to put it through the tumbler because of the damage. Any thing to get it off?

We are wondering what the blue/green stuff is. Does it come off with anything like soap in water? I don't want to put it through the tumbler because of the damage. Any thing to get it off?
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), you can soak it in ketchup for a while and the green oxidation will come off. Once it soaks for a while, you can rub it with a q-tip to help get the green off, it may take a few rounds of cleaning, but it should clean up nicely.







