Seleukos I Nikator (The Victor), Founder and King of the Seleukid Empire of Syria, 312-281 BC. Minted in Babylon Struck in the name of Alexander III of Macedon, circa 311-300 BC.
Size:  25mm  Weight:  17.1 grams 
Obverse: Head of Herakles right, in lion skin
Reverse: Zeus Aetophoros seated left; MI in left field; monogram in wreath below throne