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

CONSTANTINVS PF AVG, laureate, draped, cuirassed bust right
SOLI INVICTO COMITI, Bust of Sol right, radiate and 
draped, seen from rear. 

No mintmark. 

RIC VI Trier 894 var. 

RIC does not list this bust type seen from the normal view. 

With permission of Roma Numismatics, November, 2009