Valens, AE3 of Aquileia. 

DN VALEN-S PF AVG, pearl diademed, draped, cuirassed bust right.
SECVRITAS-REIPVBLICAE, Victory advancing left, holding wreath and palm.
Left field: B.
Mintmark SMAQP.

RIC IX Aquileia 9b, type ii(a)

Courtesy of www.tesorillo.com, Aug. 2011.