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

IMP DIOCLETIANVS AVG, laureate, cuirassed bust left, 
spear over shoulder and shield on left arm
GENIO POPV-LI ROMANI, Genius standing left, tower on 
head, naked except for chlamys over left shoulder, 
holding patera and cornucopiae. 

A-Gamma across fields. 
Mintmark TR. 

RIC VI Trier 193. Rare.

With permission of Roma Numismatics, Apr, 2010