Watch List notes:

Leo IV, the Khazar. 775-780 AD. Solidus, 4.40g (6h). Constantinople. Obv: LEONVS S[ EςςON CONSTANT]INOS O NEOS Facing busts of Leo IV, with short beard (on left) and Constantine VI, beardless (on right), each wearing crown and chlamys; between their heads, pellet; in field above, cross. Rx: LEON PAP' CONSTA[NTINOS PATHR] Facing busts of Leo III (on left) and Constantine V (on right) both with short beards, each wearing crown and loros; between their heads, pellet in field; above, cross. Berk 232. DO 1. Sear 1583.