Watch List notes:

L. Calpurnius Piso Frugi. 90 BC. AR Denarius (16.5mm, 4.03 g, 10h). Rome mint. Laureate head of Apollo right; X to left, X below chin / Horseman galloping right, holding palm frond and reins; LXVI below. Crawford 340/1; Sydenham 663e; Calpurnia 11. Lightly toned, faint hairlines on obverse, minor deposits on reverse. Good VF.

Ex Classical Numismatic Group Electronic Auction 321 (26 February 2014), lot 448.