Watch List notes:

M. Sergius Silus, Denarius, Rome, 116 or 115 BC; AR (g 3,80; mm 18; h 6); Helmeted head of Roma r.; before, EX S C; behind, ROMA and *, Rv. Horseman l., holding sword and severed gallic head; before, Q; below, M SERGI; in ex. SILVS. Crawford 286/1; Sergia 1; Sydenham 534.
Lustrous, good very fine.