Istros, Thrace, AR Hemiobol (Late 5th-4th centuries BC). 8 mm, 0.52 g.

Facing male heads, the right inverted. 
ISTRIH, Sea eagle left on dolphin left. E beneath eagle's tail.

Unpublished denomination. Naumann 106, 55. (AMNG 451 and Canarache 433 var = trihemiobols).

With permission of Numismatik Naumann auction 106, Lot 55, Aug. 2021