Antoninus Pius (138-161) AR Denarius (Silver, 3.53g, 18mm) Rome, 151-152
Obv: IMP CAES T AEL HADRAN – TONINVS PIVS P P, Laureate head r.
Rev: TR POT XV – COS IIII Tranquillitas standing r., holding rudder and barley ears; in exergue, TRANQ.
Ref: RIC 218.