Then what name would put to it? Slightly Misaligned? Looks like the coin in this post. http://www.cointalk.com/forum/t56173/
my 1920D...prove me wrong! I bought a collection of Buffalo's several years back in a Whitman folder. This coin was in the 1920D slot...never checked it until I got home.
It's post-strike damage. Some metal has been relocated from the edge or rim to the periphery of the design in the form of a thin, narrow apron. Observe how the apron lies loosely over the tops of the letters. That's impossible in a mint error.