L. Calpurnius Piso Frugi, 90 BC. Denarius (Silver, 19 mm, 3.91 g, 11 h), Rome. Laureate head of Apollo to right; behind IIII. Rev. L•PISO•FRVGI / L• Horseman galloping right, holding whip in his right hand and reins in his left; above, XXIII / ROMA in monogram. Babelon (Calpurnia) 12. Crawford 340/1. RBW 1254 var. (different control marks). Sydenham 660. A lustrous example with beautiful iridescent toning. Struck from worn dies with some breaks, otherwise, good extremely fine.
From an old Swiss collection, privately acquired from Münzen & Medaillen in the 1960s or 1970s (with original ticket).