RIC describes this coin as Roma holding a globe, but this one is holding a victoriola. Drost notes for this type "avec un globe (exceptionnellement, une victoriola)" for #79
Maxentius
A.D. 307
24x27mm 6.0g
IMP C MAXENTIVS P F AVG; laureate head right.
CONSERVATO RES VRB SVAE; Roma seated in hexastyle temple holding victoriola & sceptre, shield at side; knobs as acroteria; wreath in pediment.
In ex. R✶P
RIC VI Rome 198a var.