I believe this is a sign of Zinc Rot, I might be off on this, but I have seen dozens of post copper cents like this, usually mid-80's. Perhaps it was improper mixing of the metals, or an issue with the copper plating?
I don't think there is a premium on this issue. keep looking, weigh all of your 83 cents as there may be one that is copper and not zinc, which is worth a ton of cash.
I don't think there is a premium on this issue. keep looking, weigh all of your 83 cents as there may be one that is copper and not zinc, which is worth a ton of cash.

























