ROMAN/ Maxentius CE 306-312

AE Follis, 24x26mm,   5.9 g, Ostia mint, CE 309-312
RIC VI Ostia, 35
O: IMP C MAXENTIVS P F AVG; laureate head right.
R: AETERNITAS AVG N; Castor and Pollux standing facing each other, each leaning on sceptre with outer left arm and holding bridled horse. in ex. MOSTS