Seleukos I Nikator AR Tetradrachm. Ekbatana mint, ca 295-281 BC. 27 mm, 17.2 g.

Head of Herakles right, wearing lionskin headdress.
BASILEWS SELEYKOY, Zeus seated left holding eagle and sceptre.
IΣ and KE monograms above horizontal anchor above forepart of horse grazing left; in left field, SW beneath throne. 

SC 204.1a; HGC 9, 13c. 

With permission of Numismatik Naumann Auction 102, Lot 354, May 2021