Istros, Thrace, AR Drachm, 5.61 g. 4th century BC. 

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

Canarache 119.

Sold by Marti Hervera, Soler & Llach - Auction 1087, Lot 22, July 2015.