Cn. Carbo; 121 BC, Denarius, 3.69g. Cr-279/1, Syd-415, RSC Papiria-7. Obv: Helmeted head of Roma r., X behind. Rx: Jupiter hurling thunderbolt and holding reins and scepter in quadriga r., CARB below, ROMA in exergue. In envelope labeled, "This coin is a Vatican duplicate from the St. John's College Collection".A bit grainy A bit grainy. VF (215)