Watch List notes:

Q. Marcius Libo, Denarius, Rome, 148 BC; AR (g 3,80; mm 20; h 1); Helmeted head of Roma r.; behind, LIBO; before, X, Rv. The Dioscuri galloping r.; below, Q MARC; in ex. ROMA in partial tablet. Crawford 215/1; Marcia 1; Sydenham 396.
Lightly toned, about fdc.