Istrus, Thrace, Late 5th - 4th c. B.C. AR Drachm. 

Two young, male heads facing, the left inverted.
ISTRIH, Eagle left on dolphin; I beneath the eagle's tail, 
nothing beneath the dolphin.  

Canarache 84 and 264; Dima I-III-19.

With permission of Dr. Busso Peus Nachfolger, auction 416, lot 95, April 2016.