Antoninus Pius (138-161) AR Denarius (Silver, 2.97g, 18mm) Rome.
Obv: ANTONINVS AVG PIVS P P TR P XII, Laureate and draped bust right.
Rev: COS IIII, Annona standing left, holding grain ears and resting hand on modius set on prow to right.
Ref: RIC 176 var. (bust).