[A white plaster reverse portrait medallion depicting Sir Robert Walpole] [realia].[18th century?]zxxRound plaster mold of a portrait medallion of Sir Robert Walpole. Bust in profile facing right, long wig, wearing the star of the Bath. Lettered on the obverse: " Robertus Walpole."Title from dealer's catalog.The image inscribed: Robertus Walpole.