Maximian Herculius, AE Follis. Siscia. 294 AD. 

IMP CMA MAXIMIANVS PF AVG, laureate head right
GENIO POPV-LI ROMANI, Genius standing left, modius on head, 
naked except for chlamys over left shoulder, holding patera 
and cornucopiae. 

S-Gamma across fields. 
No mintmark. 

RIC VI Siscia 76b.
With permission of Roma Numismatics, Jun, 2010