1820 O-108 R2, No Knob 2, Capped Bust Half Dollar

Obverse: 6
Reverse: G
Somewhat common, and the only actual doubled die capped bust variety. Available in all grades up to MS66, though MS examples are quite scarce.

NGC Graded AU58. A pleasing coin that is not too heavily toned and clean. May be a tad overgraded, but has an attractive look. From Heritage way back in 2006: A trace of highpoint friction keeps this piece from Mint State. Generally well struck with still-lustrous gray-gold surfaces and a dark streak of patina behind Liberty's head.
1820, O-108, Square Base 2, Large Date, No Knob, Capped Bust Half Dollar
1820, O-108, Square Base 2, Large Date, No Knob, Capped Bust Half Dollar
1820, O-108, Square Base 2, Large Date, No Knob, Capped Bust Half Dollar
1820, O-108, Square Base 2, Large Date, No Knob, Capped Bust Half Dollar
Variety Attribution: Obverse-Star recut on two lower inside points. Star 7 nearly touches milling. Date is 9 1/2 mm., large and medium wide, with square base 2 and no knob.

Reverse- 50C is 2 mm. and low. Arrow to A is 3/4 mm. Right sides of T-I nearly in line. This variety usually sharp and well executed bother obverse and reverse.
Notes:
The O-108 is a doubled die error reverse. There is doubling on the upper side of the left wing tip to to the left of all three claws and the left talon. The doubling is strongest  on the three lower pairs of leaves, berries and berry stems of the olive branch. Light doubling is seen on the second and third talons and back of the two lower arrowheads. This was caused when the hub (which consists of the eagle/arrows/olive branch image) was a little off during the second impression into the die.

1820 Leaman-Gunnet Emission Sequence Number for O-108: 6
Overall Number: 131

Top five condition census coins from last 10 years of auction and sale records:
09/15 Stack's-B (Pogue Part II)               PCGS MS66+ (former PCGS MS65)
01/17 Heritage (FUN-Ft Lauderdale)      NGC MS65
10/15 Heritage (Gardner-New-York)      NGC MS65
06/14 Heritage (Gardner-New York)      PCGS MS65 CAC
08/16 Heritage (ANA-Anaheim)                PCGS MS63 CAC (Pryor)