Capped Bust Half Dollar Attribution Guide
1827 O-116 R4

Obverse: The chin has been retooled to a square rather than a rounded appearance. The mouth is open.

Reverse: The flag of the 5 has been recut. It appears to have a double tip at the end. (This is also a diagnostic for the O-105.) There are lumps caused by die rusting around ES O, under A3 and on the field under the eagle's head. These are usually only visible on higher grade specimens.