Alexander III AR tetradrachm, Mesembria mint. 250-175 BC. Posthumous issue. 

Head of Herakles right, wearing lionskin headdress.
BASILEWS ALEXANDROY to right and left of Zeus seated left, 
right leg drawn back, holding eagle and sceptre. 
Corinthian helmet and HT monogram in left field, KOTYS in small letters beneath the throne. 

Price 1033. 

Image courtesy of the British Museum.