Watch List notes:

C. Aburius Geminus, Denarius, Rome, 134 BC; AR (g 3,91; mm 18; h 1); Helmeted head of Roma r.; behind, GEM; before, *, Rv. Mars in quadriga r., holding spear, shield, reins and trophy; below, C ABVRI; in ex. ROMA. Crawford 244/1; Aburia 1; Sydenham 490.
Lustrous, about fdc / fdc.