Seleucus II Callinicus AR Tetradrachm. Antioch on the Orontes, late in reign. Diademed head of Seleucus II right / Apollo standing left, examining arrow & resting elbow on tall tripod, <font face="SYMBOL">X</font>Y monogram in outer left field, inverted <font face="SYMBOL">W</font>/P in outer right field. Newell 1021.