Diocletian, AE Follis. 302-303 AD. Trier. 

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

S-F across fields. 

Mintmark IITR. 

RIC VI Trier 519a.

With permission of Roma Numismatics, October, 2009