Classical Cash and OldRomanCoins.com present:

    Anon., Roma / Dioscuri riding. VF

     Anonymous, AR denarius, (3.99g) 157-156 BC, Helmeted head of Roma
     right, X behind. / The Dioscuri riding right, [R]OMA in linear
     frame below. RSC2, C198/1. VF. Goodman Collection.