This is a fairly rare type that just sold for $170...just a bit more than I was willing to gamble.
Decentius
A.D. 351-3
23mm
D N DECENTIVS CAESAR; bare-headed & cuirassed bust right.
SALVS DD NN AVG ET CAES surrounding wreath enclosing Chi-Rho flanked by A-W
In ex. TAR
RIC VIII Arles 198
