What is the cause of damage to this coin? I havent seen anything like it before...little "craters" all over and the rim being gouged. Looks like something may have been spilled on it at some point, like a corrosive acid or...is it something that can happen over time? [img=http://imageshack.us/a/img259/8480/kgrhqrk4f9lqzhkdbqw5wb4.th.jpg] [img=http://imageshack.us/a/img821/6145/t2ec16jce9s4psmttbqw5ju.th.jpg] [img=http://imageshack.us/a/img255/6494/kgrhqziofbqfjnz1rbqw5bq.th.jpg] [img=http://imageshack.us/a/img32/4476/kgrhqzk4fc00pyzbqw5h8df.th.jpg]
My guess is that someone was playing with a welder on that coin. It also looks like they did some brazing on it.