Watch List notes:

The Roman Republic

Denarius, uncertain mint circa 206-200, AR 4.05 g. Helmeted head of Roma r.; behind, X. Rev. The Dioscuri galloping r.; below horses, shield and carnyx and ROMA in partial tablet. Babelon Decia 1. Sydenham 290. RBW 579. Crawford 128/1.
Rare. Struck on an exceptionally large flan, wonderful dark tone and good extremely fine

Ex NAC 73, 2013, Student and his Mentor part II, 42.