Diocletian, Trier, AE follis. AD 303-305.

IMP DIOCLETIANVS AVG, Laureate, draped and cuirassed bust right.
GENIO POPV-LI ROMANI, Genius, turreted, standing left, holding patera and cornucopiae.
S-F across fields.
Mintmark PTR.

RIC VI Trier 583a

With permission of Ira & Larry Goldberg Coins & 
Collectibles, Auction 69, Lot 3615, May 2012