1950s vintage diner steak servers, black melmac / metal Thermo-plates

20 vintage Thermo-plates, round stainless steel plates which fit into heavy black melamine rims. These are cool, roadhouse steakhouse style, and the marked patent nunber dates them to 1951.

The metal plates are 7 1/4" in diameter, and the plate holder measures 9 1/2" across. All have been used, but all work fine, and have no chips or dents.