Decentius AE4. Rome.

Obv: MAG DECENTI-VS NOB CAES, bare-headed, cuirassed bust right, B behind head 
Rev: VICT DD NN AVG ET CAES, two Victories standing facing 
each other holding shield inscribed VOT/V/MVLT/X; 

Star in lower centre. 
Mintmark: RS. 

RIC VIII Rome 219, rated common.