Constantine I. AE follis. Rome mint, struck AD 315-316) 

IMP CONSTANTINVS P F AVG, laureate, draped, cuirassed bust right.
SOLI INV-I-CTO COMITI, Sol standing left, chlamys draped over
left shoulder, holding globe and raising right hand.
C-S across fields.
Mintmark RS.

RIC VII Rome 40.
Rated C3.

Contributed by Henri van Daalen, May 2015.