Constantius II AE3 of Arles. 

FL IVL CONSTANTIVS dot NOB C, laureate and cuirassed bust right,
GLORIA EXERCITVS, two soldiers holding spears and shields with two narrow standards between them. 

Mintmark SCONST. 

RIC VII 342 var (dot in obv. legend)

Contributed by Richard Demarco of Carpe Diem Numismatics, Dec. 2020.