Valens, AE3, small module, Cyzicus, AD 364-367. 

DN VALEN-S PF AVG, pearl diademed, draped, cuirassed bust right
GLORIA RO-MANORVM, emperor walking right, holding labarum 
and dragging captive behind him. 

Mintmark SMKB. 

RIC IX Cyzicus 8b; Sear 19761.