I got this year's ago, threw it in a 2 by and marked it as a 1936 ? As in p d or s. Now looking closer, is all of it cause by grease filled die? Or double die. Or pmd
If it was acid, wouldn't the color be dark? The obverse side is still the original color, more so than the reverse.
It looks like it was corroded and then cleaned with an electric wire brush, due to the waves on the reverse. Acid will usually turn a copper coin to a lighter color if it is aloud to make contact with bare metal.
This is the best do far. And I appreciate all the info. What ever happened, it's cool enough for me to keep.