I got this in change this weekend in Gatlinburg TN is this post mint damage or a struck thru error? The reverse looks normal. Thanks for the help Tim
Actually and I believe this to be true, yours could be called a struck through grease filled die. The most frequent occurrance, however, is that the grease doesn't get anywhere interesting on the coin, and simply obscures or weakens a minor area of the surface, and nobody ever notices it.