Alexander III, AR tetradrachm, lifetime issue, 336-323 BC. 
26 mm, 17.25 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.

Thunderbolt in left field. 

Price 8; Mueller 3; Demanhur 132-150; SNG Cop 661.

With permission of Leu Numismatik, Auction 6, lot 78,
Dec. 2018.