Kingdom of Macedon, Alexander III ‘the Great’. AR Tetradrachm (Silver,16.18 g 28mm), 336-323 BC. "Amphipolis" mint. Struck under Philip III, circa 320-317 BC.
Obv: Head of Herakles right, wearing lion's skin headdress
Rev: Zeus seated left, holding eagle in right hand, sceptre in left; monogram in left field, Π• under throne.
Ref: Price 132 var. (mon.)