Odessos, Thrace, AE17, ca 90-72 BC. 3.08 g.

bearded, laureate head right. Rev: 
ODHSI beneath bearded and helmeted horseman on horseback galloping right, wielding spear. 

AMNG 2210. 

With permission of H. D. Rauch GmbH, Summer Auction, 2011, lot 75.

The relatively poor workmanship is typical for this issue 
and this reverse type with horse galloping is much rarer than the trotting horse type.