Istros, Thrace, AR Trihemiobol, 11 mm, 1.35 g. 4th century BC. 

Facing male heads, the right inverted.
ISTRIH, sea-eagle left on dolphin, Q under eagle's wing, K beneath dolphin. 

Canarache 369.

With permission of Pecunem Gitbud & Naumann - Auction 33, Lot 44. July 2015