Watch List notes:

Cn. Papirius Carbo. 121 B.C. AR denarius (20 mm, 3.86 g, 5 h). Rome. Head of Roma right, wearing winged helmet; X behind / CARB below; ROMA in exergue, Jupiter driving galloping quadriga right, hurling thunderbolt and holding scepter and reins. Crawford 279/1; Sydenham 415; Papiria 7. Light iridescent tone. Very fine. 

Ex Artemide Aste 8E (27 May 2001), 8157.