Hi All, I'm new at this so bare with me and all my future mistakes. I'm stumped with this coin and what to even properly categorize it as.
Damaged. The surfaces are corroded/stained/plated/etc. It didn't leave the US Mint like that - sorry.....
You should post a photo of your coin here you may win a real error coin. https://www.cointalk.com/threads/open-error-coin-giveaway.349972/#post-3865890.
Looks to be solder or melted lead on the coin, that would account for the little bump you circled. No error.