With the new better pictures, 100% no doubt, certain, glue, not an error. Soak it in acetone, don't dab at it, it won't hurt it. Positively, glue.
Try soaking the coin in acetone, I suspect the "error" will disappear. The acetone will not harm the coin.
Yes, zinc deterioration beneath the copper plating.
Cheap souvenir type fake coin. These are sold in tourist shops in Civil War historic areas.
You should definitely spend your money and have this rare one of a kind error authenticated!
Nothing in this post makes any sense whatsoever.
Yup, just damage.
Separate names with a comma.
