Alexander III, AR tetradrachm. Posthumous issue. 17 g. Uncertain mint in Greece or Macedonia. 

Head of Herakles right, wearing lionskin headdress.
ALEXANDROY, Zeus seated left, right leg drawn back, holding eagle and sceptre.

Phi in left field.

Price 796; Black Sea Hoard 330 (this coin).

Image courtesy of Constantin Marinescu, "the Black Sea Hoard".