Silver antoninianus, 21mm, 3.56gm, issued AD 257.
Obv: IMP VALERIANVS AVG, Radiate, draped bust facing right.
Rev: PM TRP V COS IIII PP, Emperors standing facing each other, resting on shields between them and spears behind.
References: Sear 9962, RIC 277, RSC 169.