Watch List notes:

M. Sergius Silus, Denarius, Rome, 116 or 115 BC; Ag 3,96 g; 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.
Very fine
Crawford 286/1
MBC