I just got this Maxentius as Caesar. These are tough to find...a few years ago I sold an example and shortly after selling it, I decided to collect the series and it took me almost three years to get another example.
Maxentius
A.D. 306
28mm 10.1g
M AVR MAXENTIVS NOB CAES; Laureate head right.
SALVIS AVGG ET CAESS FEL KART; Carthage standing facing, head left, holding fruits in both hands; H in left field.
In ex. Δ
RIC VI Carthage 51a