Diocletian AE Antoninianus. 283 AD. Lyons. 

Obv: IMP CC VAL DIOCLETIANVS PF AVG, radiate, draped, cuirassed bust right
Rev: FELICITAS AVG, Felicitas standing left, legs crossed, leaning on column, holding caduceus, D in left field. 

RIC V-2 19. 

With permission of Roma Numismatics, June 2009