Watch List notes:

L. Calpurnius Piso Frugi. 90 BC. AR Denarius (17mm, 3.92 g, 8h). Rome mint. Laureate head of Apollo right; wasp to left / Horseman, holding palm frond and reins, on horse galloping right; (VT) below. Crawford 340/1; Sydenham 663; Calpurnia 11; RBW 1256-63 var. (controls). Good VF, toned.

Ex Classical Numismatic Group Electronic Auction 393 (19 December 2012), lot 231.