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

IMP DIOCLETIANVS P AVG, laureate, draped, cuirassed bust right, 
seen from the back
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 294.

With permission of Roma Numismatics, March. 2010