1797 O-101 R4+ Draped Bust Half Dollar

Obverse 1
Reverse A (Third Marriage, first used in 1796)
O-101 R5 below, O-101a R4+ at bottom

It appears that research has documented approximately 100 examples of this die marriage, with  between 30 and 35 101's and 65-70 101a's. Most of the higher grade examples are of the later die state.
1797, O-101, R5, Draped Bust, Half Dollar
1797, O-101, R5, Draped Bust, Half Dollar
1797, O-101, R5, Draped Bust, Half Dollar
1797, O-101, R5, Draped Bust, Half Dollar
Variety Attribution O-101: Obverse-15 stars. Date close and high, with 1 and 7 close to curl and bust. Star 15 touches drapery. Star 9 very close to upper right serif of Y.
O-101a: Die begins to break up, with one of the earlier cracks from edge through star 2 to the curls and cracks continue to develop, until in its final stages there are numerous and extensive breaks.

O-101: Reverse-Fraction 1/2 well centered below ribbon knot. 10 berries on laurel branch. A leaf is close to lower left serif of second T in STATES but does not touch. A palm leaf close below base of F extends halfway between OF. Small die defects at lower left base of C and above inside curve. Circular crack that runs from tip of palm leaf at base of F, through right side of O to segment of milling.
O-101a: Like the obverse, this reverse begins to break up, but even sooner. In addition to the small crack previously mentioned, a new one develops from edge between DS and across left wing. Another from edge through the first T in STATES to eagle's head and in its final states this reverse becomes a mass of die breaks.
1797, O-101a, R4+, Draped Bust, Half Dollar
1797, O-101a, R4+, Draped Bust, Half Dollar
1797, O-101a, R4+, Draped Bust, Half Dollar
1797, O-101a, R4+, Draped Bust, Half Dollar
Top five condition census coins from last 10 years of auction and sale records (O-101):
04/09 Heritage (CSNS-Cincinnati)       NCS XF40 det (pin scratches obverse, hairlines, ex Reiver)
01/09 Heritage (FUN-Orlando)             NCS XF40 det (light clean mod adj marks ob
01/08 Heritage (FUN-Orlando)             NCS VF details (repaired and cleaned)
03/08 Stack's (Gaziano-New York)       NGC F15
01/08 Heritage (FUN-Orlando)             PCGS VG06          

Top five condition census coins from last 10 years of auction and sale records (O-101a):
05/15 Stack's-B (Pogue-New York)      PCGS MS66
08/14 Heritage (Chicago)                      PCGS MS65+ CAC (Norweb)
04/15 Heritage (CSNS-Chicago)            PCGS MS64    
06/14 Heritage (Gardner-New York)    PCGS MS63
08/10 Heritage (Witham-Boston)          PCGS AU58 CAC