Alexander III, AR tetradrachm, Kallatis mint. Posthumous  issue. 16.91 g. 

Head of Herakles right, wearing lionskin headdress.
ALEXANDROY, Zeus seated left, holding eagle and sceptre.
PMF in left field, KA monogram beneath throne.

Price 918 var; Black Sea Hoard 25 (this coin). 

Courtesy of Constantin Marinescu ("The Black Sea Hoard").