Seleukid Kings of Syria, Seleukos I Nikator (312-281 BC) AR Tetradrachm (Silver, 15.77g, 24mm) Susa, ca 295/4-291 BC.
Obv: Head of Herakles right, wearing lion skin
Rev: Zeus Aëtophoros seated left; in left field, facing radiate head of Helios above monogram; below throne, M above strut, AP below.
Ref: SC 165.1a; ESMS Al.33 (A16/P5) = ESM 299α (this coin, illustrated); HGC 9, 12j.