This 1809 Capped Bust Half is the die marriage O-110.2 and has the 'XXX' edge.  It is a PCGS VF30 and considered to be R4+ in rarity.  To quote Ron Guth in PCGS Coinfacts:
 
"The XXX edge is one of four edge varieties found on 1809 Half Dollars. These include: XXX edge, IIIII edge, plain edge, and the so-called "normal" edge (with "a pseudo engraved in front of FIFTY" - per Overton). Several varieties comprise the XXX edge: O-101, O-102, O-108a, and O-110. Curiously, different die states of the same variety can have different edges. For example, O-102 is found with the XXX edge, but O-102a is found with a plain edge. Similarly, O-108 has a IIIII edge, but O-108a has a XXX edge."
 
PCGS lists the O-110 variety as a pop. 3 in VF30, 13 higher, and 23 total.  CAC/CACG lists 2 in VF30 including this one, 1 in XF45 and 1 in MS63.  This pretty much puts this example on an elite list for those that meet CAC expectations from an already uncommon coin.  This half exhibits shades of gray and russet as an original VF coin should be from this era, with the obverse showing a circulated cameo look.   Just a great coin for a very rare variety.  Given the paucity of CACed coins, the opportunity to obtain this die marriage in the XF45 or MS63 would be, well, maybe sometime, er, maybe not?
 
This coin is approved by CAC.
 
PCGS Cert. #38274932