This is the round tray in the 1950s Guardian Service hammered aluminum cookware line by Century Metalcraft. It can be used as a platter, a serving tray, a griddle, or a pizza pan, though its main function was to allow the Guardian trio pots to all cook together on a single burner. It measures 15-1/2 inches diameter, 18-1/2 inches handle to handle. Super clean and shiny with no scratches, warping, or damage.
Guardian Service 15 Inch Round Tray or Platter