Watch List notes:

L. Calpurnius Piso Frugi. 90 BC. AR Denarius (18mm, 3.94 g, 8h). Rome mint. Laureate head of Apollo right; mark of value to left; A below chin / Horseman galloping right, holding palm frond and reins; R/• above. Crawford 340/1; Sydenham 671; Calpurnia 11a; RBW 1263 var. (control letters). Lightly toned with faint iridescence, thin reverse die breaks. EF. Well centered with some luster.