Alexander III, 336-323 BC, AR tetradrachm, lifetime issue.
17.27 g. struck 330-320 BC, Byblos Mint.

Head of Herakles right, wearing lionskin headdress.
ALEXANDROY, Zeus seated left, legs uncrossed, 
holding eagle and sceptre.
AR monogram in left field with the loop of the R 
halfway down the A. 

Price 3424. 

With permission of Numismatica Ars Classica Auction 92 Part 2, Lot 1440, May 2016.
Ex Gorny & Mosch sale 156, 2007, 1279. 
Estimate: 1000 CHF...