Constantine I. AE Follis, Trier. 320-321 AD.

CONSTA-NTINVS AVG, helmeted, cuirassed bust right.
VIRTVS-EXERCIT, two captives seated at the base of a trophy. T-F across fields.
Mintmark dot PTR. 

RIC VII Trier 279, rated scarce.

With permission of Roma Numismatics, Jul, 2010