Decentius Caesar. AE3 of Lyons. 

DN DECENTIVS NOB CAES, bare-headed, cuirassed bust right.
VICTORIAE DD NN AVG ET CAE, two Victories standing facing 
each other, holding between them a shield inscribed VOT V 
MVLT X.
Mintmark RSLG.

RIC VIII Lyons 152.
Rated R2