Seleukid Kingdom. Seleukos I Nikator, 312-281 BC. AR Tetradrachm (23mm, 17.14g). In the name and types of Alexander III of Macedon. Babylon I mint, circa 311-300 BC. Head of Herakles right, wearing lion skin / Zeus Aëtophoros seated left; H in left field, monogram within wreath below throne. SC 82.7; Price 3708; HGC 9, 10f.