Antoninus Pius (138-161) AR Denarius (Silver, 2.95g, 17mm) Rome, 152/3.
Obv: ANTONINVS AVG PIVS P P TR P XV, laureate head of Antoninus Pius right
Rev: COS IIII, Vesta standing facing, head left, holding simpulum and Palladium.
Ref: RIC III 118