Istrus, Thrace, Late 5th - 4th c. B.C. AR Drachm. 5.35 g. 

Two young, male heads facing, the left inverted.
ISTRIH, Eagle left on dolphin; RXA monogram beneath dolphin 
with the head of the R turned inwards. 

Unpublished without a Delta beneath the eagle.

Dr. Busso Peus Nachfolger, Auction 416, Lot 93.

With permission of Dr. Busso Peus Nachfolger, April 2016.
Auction 416, Lot 93