Kings of Bithynia, Prusias II. ca 238-149 BC. AE16mm. 

Head of Prusias right, in winged diadem. 
BASILEWS PROUSIOU to right and left of Herakles standing left,
with club and lionskin; MY monogram to right.

RecGen 26, monogram 6

With permission of Roland Müller, added April 2013.