Watch List notes:

Cn. Gellius, Denarius, Rome, 138 BC; AR (g 3,84; mm 19; h 4); Helmeted head of Roma r.; behind, X; laurel-wreath as border, Rv. Warrior (Mars ?) in quadriga r., grasping captive beside him; below, CN GEL; in ex. ROMA. Crawford 232/1; Gellia 1; Sydenham 434.
Lustrous, about extremely fine.