Maximianus Herculius AE Antoninianus. 

Obv: IMP MAXIMIANVS PF AVG, radiate, draped, cuirassed bust right 
Rev: VIRTVS AVGG, Hercules standing looking left, holding club, trophy and 
 lions skin, XXI(stigma) in ex.

Ref:  RIC V-2 515 Rome (rated scarce)

Contributed by Dane, April, 2004.