Diocletian, AE follis, Trier. AD 298-299. 

IMP DIOCLETIANVS AVG, laureate, cuirassed bust left,
holding sceptre over right shoulder, shield on left arm.
GENIO POPV-LI ROMANI, Genius standing left, modius on head, 
naked but for chlamys over left shoulder, holding patera 
and cornucopiae. 
B-star across fields. 
Mintmark TR. 

RIC VI Trier 314. 
Rated scarce.

With permission of Paul-Francis Jacquier, Oct. 2015.