Maximianus AE Follis. 300-301 AD. 

IMP C MA MAXIMIANVS PF AVG, laureate head right.
GENIO POPVLI ROMANI, Genius standing left, modius on head, 
naked except for chlamys over left shoulder (falls low), 
holding patera from which liquid flows, and cornucopiae.

Z in right field, K-V across fields. 
Mintmark ANT. 

RIC VI Antioch 54b; Sear 13275.