Maximianus AE silvered Follis, 296-297 AD, Rome. 9.46 g. 

IMP C M A MAXIMIANVS P F AVG, laureate head right.
GENIO POPVLI ROMANI, Genius standing left, modius on head, naked except for chlamys over left shoulder, holding patera and cornucopiae
Left field: R
Mintmark: (officina letter) A

RIC VI Rome 63. 

With permission of Helios Auction 5, June 2010, lot 432
Added in Aug. 2011.