Diocletian. AE Follis. Trier. 296-297 AD. 

IMP DIOCLETIANVS PF AVG, laureate head left
GENIO POPV-LI ROMANI, Genius standing left, modius on 
head, naked except for chlamys over left shoulder, 
holding patera and cornucopiae, A in left field, gamma
in right field

Mintmark TR in ex. 

RIC VI Trier 176a. 

With permission of Roma Numismatics, August, 2009