Valentinian I, AE3, Arles.

DN VALENTINI-ANVS PF AVG, pearl diademed, draped, cuirassed 
bust right.
SECVRITAS-REIPVBLICAE, Victory advancing left, holding
 wreath and palm. 
OF-III across fields.
Mintmark: CONST

RIC IX Arles 9a, type ii(c)

Forum Ancient Coins. Sep, 2006