In the top half of the E i noticed a curved line . Is that a number? Also how would that error happen and is that doubling on the letters? I always think it is then find out im still wrong lol. And will the answers effect the value very much? TYIA
The reprocessing of Zinc Coated Steel Planchet Cents causes that doubling appearance. It's not a Doubled Die variety.
A quick way is to look at the edge. Processed coins have the edge plated as well. An unplated, original coin will show the edge in its natural state.
I’m thinking it was reprocessed. There appears to be a few marks on Lincoln abs it looks to me like they are too shiny.
YES, its color. After you see enough of them it will become very easy. That's because women usually have a better eye for detail than men. The reflection in your image is causing the edge to look like copper. Another image of the edge with color as good as the obverse or reverse would be great. In general, 1943 cents start out as brilliant silver gray and deteriorate from there until they turn gray (as your image shows) or dark gray. If the coin is shiny, it is replated or polished.