Constantine I, AE heavy follis of Trier, AD 309.

IMP CONSTANTINVS P F AVG, laureate, cuirassed bust right.
MARTI PATRI CONSERVATORI, Mars standing right, wearing 
helmet, holding spear, point downwards, and resting 
left hand on shield.
T-F across fields.
Mintmark PTR.

RIC VI Trier 830.
Rated scarce.

Contributed by Glenn Simonelli, June 2014.