There is a filling point where hot or boiling water would have been poured into to heat the plates placed on top. Touch Mark 3: 2 Xs with crown denoted superior quality. Four touchmarks on the underside.
Antique Pewter Plate Warmer Early 19thC Marks T&T Compton Unusual Design 2 part
Antique Georgian Pewter Plate 2, Stynt Duncombe?
Antique Georgian Pewter Plate John Home London c.1760 – Clear Touchmarks 21cm
Antique Vintage James Dixon’s Of Sheffield Pewter / Britannia Metal Plate Warmer
Antique Georgian London Pewter Plate 9.5 Inch Bush & Perkins B&P Hallmarks
18th Century Georgian Antique Pewter Plate 10 Inch