Constantine I. AE Light Follis. 310-313 AD. Trier.

CONSTANTINVS PF AVG, laureate, draped, cuirassed bust right.
MARTI CON-SERVATORI, Mars, helmeted, standing right, 
leaning on reversed spear and resting left hand on 
shield on ground. 

T-F across fields
Mintmark PTR in ex. 

RIC VI Trier 863.

With permission of Roma Numismatics, October, 2009