Istros, Thrace. 4th Century BC. AR Drachm. 17.13mm, 5.80 g.

Obv: Facing male heads, the left inverted. 
Rev: ISTRIH above sea-eagle standing left, grasping dolphin with 
its talons, Gamma in right field.

AMNG 427; Müller 1671; Turin 1976.

With permission of TimeLine Auctions (www.timelineauctions.com), February, 2015