Constantine II, AE follis. Arles. AD 317-318. 

CONSTANTINVS IVN NOB C, laureate, draped and cuirassed bust right.
CLARITAS REIPVB, Sol standing left, chlamys across left
shoulder, holding globe and raising right hand.
C-S across fields.
Mintmark SARL.

RIC VII Arles 141; Sear 17098.
Rated scarce.