Hola, creo que puede ser la RIC 21 a(1)
Valentinian I, AE3, Constantinople. DN VALENTINI-ANVS PF AVG, pearl diademed, draped, cuirassed bust right / SECVRITAS-REIPVBLICAE, Victory advancing left, holding wreath and palm. No fieldmarks. Mintmark: CONSPA. RIC IX Constantinople 21a (1).
http://www.wildwinds.com/coins/ric/valentinian_I/_constantinople_RIC_021a.jpg