I agree with all the above posters who said that the '39 is a die clash; it's the rounded shape of the beaver's back coming through. You see it on nickels 1940 - 1942, too. The 1999 is tougher -- maybe it was buried for a few years? I thought that nickel stood up fairly well to a lot of acids and whatnot, but I'm not really sure. It does look like it's been eaten away by something, but most of the beads on the reverse are still fairly clear. Hopefully someone who has seen this before will chime in.
Edited by pennysaver
02/16/2014 8:42 pm