Constantine II, AE follis, Arles. AD 317.

CONSTANTINVS IVN NOB CAES, laureate, draped and cuirassed bust right.
CLARITAS REIPVB, Sol standing right, looking left, holding globe and raising right hand. 

R-S across fields. 
Mintmark SARL.

RIC VII Arles 119.
Rated R4.

Contributed by Richard Demarco of Carpe Diem Numismatics