A George IV openwork cast mustard pot, the sides and feet formed from three classical figures standing on shells and joined by floral and foliate swags, with a blue glass liner, entwined serpent and branch scroll handle, and shell thumb-piece, the slightly-domed, hinged cover chased with a rococo floral and foliate cartouche engraved with a crest, Sebastian Crespel, London 1827 - 2¾in.