Constantine I AE Follis. 

Obv: IMP CONSTANTINVS PF AVG, laureate, draped, cuirassed bust right 
Rev: SOLI INV-I-CTO COMITI, Sol standing left, chlamys 
across left shoulder, 
  holding globe and raising right hand. 
Mintmark: SARL; left field: T over star; right field: F. 

RIC VII Arles 80, rated R1.

with permission of cgb.fr