Alexander III, AR Tetradrachm. Posthumous issue. Uncertain mint in Macedonia or Greece, struck ca. 310-275 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. 
Dolphin downwards to left in left field, bucranium between T I in exergue.

Price 850; SNG Saroglos 371. 

With permission of cngcoins.com Triton XII, Lot 19o, Jan. 2009.