the line runs from Lincolns hairline in a circular fashion down to the 4 then stops and runs in the same type of motion through his chest. It is not a smooth crack but full of irregularities/wandering, although slight. Also, it is a raised line that runs under my 5x loupe. Sorry about lousy pic quality, its the best I can muster with my camera. What do you guys think?
Just a question. Could this be the result of long term storage with a dime next to it causing some type of chemical reaction and/or physical abrasion? It would have to be smaller than a dime. Perhaps a small washer.