Istros, Thrace. AR hemiobol. 400-350 BC. 9 mm, 0.5 g.

Two male heads facing, the right inverted. 
ISTRIH above sea-eagle left on dolphin. H under
eagle's tail. 

Unpublished denomination (AMNG 448 and Canarache 379 = obol).

With permission of Numismatik Naumann auction 107, Lot 54, Sept. 2021.