Watch List notes:

L. Calpurnius Piso Frugi. 90 B.C. AR denarius (18 mm, 4.05 g, 12 h). Rome. Laureate head of Apollo right; behind, four pellets / L · PISO FRVGI, horseman galloping right, holding palm branch; below, (arrow)XXI. Crawford 340/1; Sydenham 664; Calpurnia 11. Extremely fine.