Alexander III, AR tetradrachm, lifetime issue, 336-323 BC. 
24 mm, 17.19 g, Amphipolis mint, struck under Antipater, ca 332-326 BC. 

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

Prow in left field. 

Price 4; Mueller 503; Demanhur 5-55; SNG Cop 658.

With permission of Leu Numismatik, Auction 6, lot 73,
Dec. 2018.