This coin is not listed in RIC for the first workshop. It is not in Ferrando for the first officina either.
Constantine I
A.D. 313- 315
IMP CONSTANTINVS P F AVG; laureate, draped and cuirassed bust right.
MARTI CON-S-ERVATORI; Mars advancing right, transverse spear in right hand and shield on left arm.
In ex. PARL
RIC VII Arles 27