Anonymous.     AR Quadrigatus (Didrachm), uncertain Sicilian mint, 218-217 BC.   Obv.    Laureate Janiform head of Dioscuri.        Rev.   Jupiter in quadriga right, driven by Victory; incuse on tablet, ROMA.     Cr. 30/1; RRSC Q 13 (R4).     6.76 g.   24 mm.      RR.  Very rare and superb example. Sharply struck from masterly engraved dies. Well centred and struck on broad flan.    EF.