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

CONSTANTINVS PF AVG, laureate, draped, cuirassed bust right, 
seen from the back
SOLI INVICTO COMITI, bust of Sol right, radiate and draped, 
seen from  the back. 
No mintmark. 

RIC VI Trier 894. Scarce.

With permission of Roma Numismatics, October, 2009