Alexander III AR Tetradrachm. Mesembria mint. Struck 250-175 BC. 

Head of Herakles right, wearing lionskin headdress.
BASILEWS ALEXANDROY, Zeus seated left, holding eagle and
sceptre.
Corinthian helmet over HR monogram in left field.

Price 1018; Propontis hoard 36; SNG Stockholm 1063.

With permission of TimeLine Auctions 
(www.timelineauctions.com), July, 2017