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

IMP DIOCLETIANVS PF AVG, laureate head right
FORTVNAE RE-DVCI AVGG NN, Fortuna seated left, holding rudder and cornucopiae. 

B-star across fields
Mintmark TR. 

RIC VI Trier 240. Rare.

With permission of Roma Numismatics, Oktober, 2009