though this coin is not in RIC, it is in Drost and Lech has others also -
http://www.notinric.lechstepniewski.info/6rom-223.htmlMaxentius
A.D. 308- 310
23x24mm 4.4gm
IMP C MAXENTIVS P F AVG; laureate head right.
VICTOR-IA AVG N; Victory advancing left, holding wreath and palm; captive seated left.
In ex. RBP
RIC VI Rome –