Silver denarius, 18mm, 3.43gm, issued AD 150/151 Rome mint.
Obv: IMP CAES T AEL HADR ANTONINVS AVG PIVS PP, Laureate head right.
Rev: TR POT XIIII COS IIII (TRANQ in ex.), Tranquilitas, draped, standing right, resting on rudder set on ground and holding two corn-ears.