Constantius II, AV solidus, AD 347-350. 

FL IVL CONSTAN-TIVS PF AVG, pearl diademed, draped, cuirassed bust right.
GLORIA REI-PVBLICAE, Roma seated on the left, head facing, 
Constantinopolis seated left on the right, looking left, 
left foot on prow, holding between them a shield inscribed VOT 
XX MVLT XXX. Roma's right hand is at the side of the shield. 

Mintmark SMANH. 

RIC VIII Antioch 81.