Watch List notes:

Q. Antonius Balbus, Denarius serratus, Rome, 83-82 BC; AR (g 3,95; mm 19; h 6); Laureate head of Jupiter r.; behind, S C, Rv. Victory on quadriga r., holding wreath and palm-branch; below, control letter; in ex. Q ANTO BALB / PR. Crawford 364/1d; Antonia 1; Sydenham 742.
Lovely iridescent tone, good extremely fine.