/biz/ - Business & Finance

>>57707260
Flip side. When it showed up the coin was very dirty, and since it's made from a pretty reactive metal (zinc) i didn't want to mess with it chemically, beside a pure acetone bath of few minutes and hot water.
As you can see there is a deposit over the "10". At first i thought it was some cement or something. But once i cleaned it a bit more, i wonder if it's not a mint error, because it looks like gluts of zinc from the coin itself.
Mint error? Chemical reaction?
If you have any clue of what it could be...