Istros, Thrace. AR drachm. 400-350 BC. 18 mm. 5.55 g.

Two male heads facing, the left inverted. 
ISTRIH legend above sea-eagle left on dolphin. I under
eagle's wing, AG (separate letters) beneath the dolphin. 

AMNG 418; BMC 7-8; Canarache 205.

With permission of Numismatik Naumann auction 121, Lot 86, Oct. 2022.