Watch List notes:

Anonymous. 206-200 BC. AR Denarius (20.3mm, 4.39 g, 12h). Shield and carnyx series. Uncertain mint. Helmeted head of Roma right; X (mark of value) behind / The Dioscuri, each holding spear, on horseback right; two stars above, shield and carnyx below. Crawford 128/1; Sydenham 290; Decia 1; Type as RBW 579. Good VF, toned, a bit of porosity on the obverse. Very rare.

From the Andrew McCabe Collection. Ex Karl Sifferman Collection (Classical Numismatic Group Electronic Auction 171, 22 August 2007), lot 69; Münzen und Medaillen Basel FPL 260 (December 1965/January 1966), lot 24 (CHF 500) = Casolari, I denari della Repubblica Romana, Edizioni Aes Rude 1998, no. 139 (this coin).