Watch List notes:

M. Calpurnius M. f. Frugi. Denarius 61, AR 3.92 g. Terminal statue of Mercury (?); on l., wreath and on r., two-handled cup. Rev. M·PISO·M·F / FRVGI Knife and patera. All within laurel wreath. Babelon Calpurnia 22. Sydenham 826. RBW 1504 (this reverse die). Crawford 418/1.
Very rare. Lovely iridescent tone and about extremely fine

Ex NAC 33, 2006, 275 and NAC 83, 2015, Student and his Mentor part III, 367 sales.