Nikomedes II Epiphanes, King of Bithynia. AR tetradrachm, Local Year 157 = 123-122 BC.

Diademed head of Nikomedes right.
BASILEWS EPIFANOYS NIKOMHDOY, Zeus standing left, holding wreath and sceptre. eagle standing left on thunderbolt over YGA monogram over 
date ZNR in left field. 

RecGen 40.12. 

With permission of Roma Numismatics, April 2014.