Seleukid Kings of Syria, Seleukos I Nikator (312-281 BC) AR Tetradrachm (Silver, 16.87g, 27mm) Seleukeia on the Tigris ca 300-281 BC.
Obv: Head of Herakles right, wearing lion skin headdress
Rev: Zeus Aëtophoros seated left, holding sceptre, ΣEΛEYKOY to right, BAΣIΛEΩΣ below; monogram in left field; ΔI monogram below throne.
Ref: SC 117.1c.