Watch List notes:

C. Calpurnius Piso L.f. Frugi, Denarius, Rome, 67 BC; AR (g 3,76; mm 19; h 6); Head of Apollo r., hair tied with band; behind, control symbol, Rv. Horseman r., with palm; below, C PISO L F FRV / control symbol. Crawford 408/1b; Calpurnia 24; Sydenham 851o.
Lightly toned, minor graffito on obverse, extremely fine.