This bust type is not listed in RIC for this series, it should come after RIC VII 146. It is in Ferrando, but only for officina T (#180).
Constantine I
A.D. 317- 318
IMP CONSTANTINVS P F AVG; laureate, wearing trabea, eagle- tipped scepter in right hand.
SOLI IN-VI-CTO COMIT; Sol standing left, chlamys across left shoulder, globe in left hand, raising right; C/S in fields.
In ex. SARL
RIC VII Arles –