Watch List notes:

Cn. Carbo. 121 BC. AR Denarius (20mm, 3.88 g, 7h). Rome mint. Helmeted head of Roma right, curl on left shoulder; X (mark of value) to left / Jupiter, holding thunderbolt and scepter, driving quadriga right. Crawford 279/1; Sydenham 415; Papiria 7; RBW 1102. Light tone. VF.

From the Charles Chamberlain Collection.