Diocletian and Constantius I, AE 32mm medallion, 15.27 gr. ca. 295-305 AD, Trier. 

DIOCLETIANVS AVG ET CONSTANTIVS NOB C, radiate and cuirassed
bust of Diocletian right, facing radiate and cuirassed
bust of Constantius I left.
VIRTVS EXERCIT IMPER ROMANI, Mars walking right, holding
trophy over shoulder, and shield, dragging a bearded, bound
captive behind him.

Mintmark PTR.

Gilles, Trierer Petermännchen 1 (this coin) otherwise unpublished.

Contributed by Dr. Hubert Lanz, auction November 2000, 
Added July 2011.