Watch List notes:

L. Calpurnius Piso L.f. L.n. Frugi, Denarius, Rome, 90 BC; AR (g 3,97; mm 18; h 2); Laureate head of Apollo r.; behind, fractional sign, Rv. Horseman galloping r., holding palm branch; below, L PISO FRVGI; above, control letter. Crawford 340/1; Calpurnia 11; Sydenham 664e.
Iridescent tone, extremely fine.