From the Gemini IV Auction, Closed January 8, 2008.
Lot 287 

            Anonymous: Ear of wheat. Silver didrachm (6.47 gm). Sicily. Janiform 
            head of Dioscuri / Jupiter holding scepter and hurling thunderbolt 
            in chariot driven right by Victory, ear of wheat below horses, ROMA 
            in relief in linear frame below. Crawford 42/1. Charles Hersh, “A 
            Sicilian Quadrigatus mint: the issue with the wheat-ear control 
            mark,” Essays Carson and Jenkins (1993), 20 (O15/R14).