Constantius II, AV Solidus. 351-355. Antioch. 4.52 g. 

FL IVL CONSTAN-TIVS PERP AVG, pearl diademed, draped, cuirassed bust right.
GLORIA REIPVBLICAE, Roma, holding spear, seated facing and 
Constantinopolis, holding sceptre and with foot on prow, seated 
left, holding between them a shield inscribed VOT XX MVLT XXX. 

Mintmark dot SMANI. 

RIC VIII Antioch 83; Cohen 108. 

With permission of Numismatik Lanz, auction 102.
Lanz 102, 1027
(Image artificially coloured, as the original was b/w).

NOTE: Roma's right hand is BENEATH the shield, so this is 
RIC 83.