This looks like it may be a strike from a different coin or just one heck of a cool set of die breaks. Also, take a look to the west of the "A" and "R" there are a second set in the field. Here are the errors in the "U" and "N" from "United" Here is the pic of the "A" and "R" from "dollar" Here is the pic from above the neck and rt wing.....Broken rays Here is the pic of the "A" and a machine doubling of the star to the west Here is a pic of the "S" from "states" and the "O" from "Of"
Well...I'm no expert, but as no one else has taken a crack at your question yet....my guess would be a very minor die-clash and some die-cracks or scratches (hard to tell from the picts). Maybe one of the resident experts can add more, hope this helps