Maximianus Herculeus. Bronze Denarius. Rome Mint. 285-286 AD. 2.19 gr.

Obv: IMP MAXIMIANVS PF AVG, laureate, draped bust right. 
Rev: IOVI CONSERVAT AVG, Jupiter standing left, holding thunderbolt and sceptre.

RIC 517 var (rev. legend, RIC lists only IOVI CONSERVATORI AVGG for this obverse).
Very Rare. 

Courtesy of Herakles Numismatics Inc. on vcoins, April 2011.