Lydia, Under Persian Rule. ca. 450-330 BC. AR Siglos, 12mm 5.43 g. 

The Great King kneeling right, holding spear and bow. 
Oblong incuse punch.

Carradice (BAR 343) Type II (plate XI, 12); BMC Persia 185. 

With permission of Ira & Larry Goldberg Coins & Collectibles 
auction 69, Lot 3154, May 2012.
Estimate $450-600.