Apros, Thrace, AE16, civic issue. 250-210 BC. 3.56-4.30 g.

Laureate head of Apollo right.
APRH-NWN anti-clockwise from bottom left, oval Celtic shield with central rib. Lyre at top right.

Draganov 1.

With permission of Solidus Numismatik, July 2015.
The reference refers to Dimitar Draganov, "Coins Of The 
Unknown Mint Of Apros In Thrace" which is available 
online.
Also described in AJN 25 (2013), p. 11 ff and plate 2, 1. 
Very rare.