Alexander III, AR Tetradrachm. Posthumous issue.   Amphipolis mint, struck ca. 294-290 BC. 25 mm, 17.13 g. 

Head of Herakles right, wearing lionskin headdress.
ALEXANDROY, Zeus seated left, one leg drawn back, holding eagle and sceptre. 
NK monogram in left field, dolphin swimming right beneath throne.

Price 507; Mueller 554; Meydancikkale hoard 375; SNG Oxford 3162. 

With permission of Fritz Rudolf Künker GmbH Auction 97, Lot 486, March 2005.