Diocletian. AE Follis. 303-305 AD. Trier. 

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

Mintmark PTR. 
No field marks !

RIC VI Trier 579 unlisted var (no field marks). 
Rare. 
Unpublished with no fieldmarks - S-F expected.

With permission of Roma Numismatics, October, 2009