Capped Bust Half Dollar Attribution Guide
1828 O-106 R4

Obverse: Curl base, knob 2. Late die states of this die marriage shows a die crack from chin to chest to rim above top of bust.

Reverse: The U was punched once, then rotated counterclockwise for its final cutting. The original cut of the U can be seen to the left of the uprights of the U. (Reverse shared with O-105 & O-107.)