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

CONSTANTINVS PF AVG, laureate, draped, cuirassed bust right
SOLI INVIC-TO COMITI, Sol, radiate, standing facing, head
 left, chlamys draped over upper chest and left shoulder,
 holding globe and raising right hand. 

T-F across fields. 
Mintmark PTR. 

RIC VI Trier 874

With permission of Roma Numismatics, October, 2009