Watch List notes:

C. Piso L.f. Frugi, 61 BC. Denarius (Silver, 19 mm, 3.96 g, 6 h), Rome. Head of Apollo to right, hair bound with taenia; behind, human ear. Rev. C · PISO · L · F FRVG Horseman galloping right, leaning forward and holding reins in left hand; above, sequence mark. Babelon (Calpurnia) 24d. BMCRR 3690 bis. Crawford 408/1a. Hersh, Piso 374 (O287/R2110). RBW 1460. Sydenham 865c. Perfectly centered and struck in very high relief, beautifully toned and one of the finest known examples of the series. Good extremely fine.
From the RBW Collection, Numismatica Ars Classica 63, 17 May 2012, 236, and acquired from Bank Leu in 1985.