Watch List notes:

M. Aurelius Cotta, Denarius, Rome, 139 BC; AR (g 3,81; mm 20; h 4); Helmeted head of Roma r.; behind, X; before, COTA, Rv. Hercules in biga of centaurs r., holding club and reins; centaurs each carry branch; below, M AVRELI; in ex. ROMA. Crawford 229/1a; Aurelia 16; Sydenham 429.
rare, large flan; lightly toned, extremely fine - good extremely fine.