Diocletian. AE Follis. Trier. 298-299 AD. 

IMP DIOCLETIANVS 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. 

A-star across fields. 
Mintmark TR. 

RIC VI Trier 305a. Scarce.

With permission of Roma Numismatics, Apr, 2010