1971 cent. I dont know what kind 9f errors these are. The areas in question look like they could be the same errors but I'm not sure about the artist's initials. It might be something different making it dissapear. And it can't be zinc rot because its copper.. so I have no clue.. what do you guys think? In case the pics aren't self explanatory on what I'm talking about, I'm talking about the UN in United, the AM in America, the disappearing initials, and the 2 pillars of the building.