Capped Bust Half Dollar Attribution Guide
1831 O-117 R4

Obverse: The 1's are tall and slender with full serifs. The 8 is higher than the 3. There are die lines in RTY of LIBERTY slanting down wards from the top center of the R to the bottom of the Y. There is a doubling of the lower right curl edge next to star 13. This is true of ALL O-117's and O-112's.

Reverse: The M of AMERICA is rotated with the left serif above the right serif of the A and the right serif below the left serif of the E. Also on the reverse TATE of STATES is rotated clockwise and appear to be progressively higher at the bottom of each letter.