Trajan Decius AR Antoninianus. 250 AD. 

Obv: IMP C M Q TRAIANVS DECIVS AVG, radiate,draped and cuirassed bust right, seen from the back
Rev: GENIVS EXERCITVS ILLVRICIANI, Genius standing left, holding patera and cornucopia, standard to left. 

RIC 18; Cohen 64. Scarce.

Contributed by Dane for Roma Numismatics, June 2009