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

Two young, male heads facing, the left inverted.
ISTRIH, Eagle left on dolphin; dot in DT monogram beneath the dolphin. 

Dima II-IV-5, otherwise unpublished.

With permission of Solidus Numismatik, April 2016.