Watch List notes:

Roman republic. Anonymous: Griffin. Denarius. Rome, 169-158 BC. Obv: Helmeted head of Roma right, X behind. Rev: Dioscuri on horseback right, each with star above head and holding spear; griffin stepping right below front legs of horses, ROMA in linear frame in exergue. 3.48 g. 19 mm. Crawford 182/1. Sydenham 283.