Istros, Thrace. AR Drachm, ca 4th Century BC. 17mm, 5,57 g.

Facing male heads, the left inverted.
ISTRIH, Sea-eagle  left, grasping dolphin with talons. DI or DT monogram beneath the dolphin. 

SNG BMC Black Sea 255.

With permission of Savoca Numismatik Auction 27 Silver, Lot 77, Nov. 2018.