Capped Bust Half Dollar Attribution Guide
1821 O-107 R3

Star 1 points to upper edge of dentil. Star 7 points to upper half of dentil, and to front of cap. Widest date of the year, and high.

Tiny dot between bases of 5 and 0. Centering dot between crossbars 3 & 4 at left. Right sides of I and T are in line.