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A George V sterling silver mustard pot by Goldsmiths & Silversmiths, hallmarked London 1919. Oval shaped with pierced side, gadroon border, pierced shell thumb piece and loop handle, with a cobalt-blue glass liner* and matched salt spoon. 4" (10.2cm) across, 4.1 troy oz (128g) weighable.
*the liner is later, and fits a little loose.