Seleukid Kingdom. Seleukos I Nikator, 312-281 BC. AR Tetradrachm (25mm, 16.99g). Carrhae mint. Struck in the name of Alexander III of Macedon, ca.305-300 BC. Head of Herakles right, wearing lion skin / Zeus Aëtophoros seated left; in left field, crescent above ΔI; monogram below throne. SC 41.3c; Price 3818.