This is a vintage Guardian Service Ware cookware serving platter from the 1950s. It is made of cast aluminum and has an oval shape with a flat bottom and double handles. The platter is silver in color and measures 13 inches in length, 10 inches in width, and 1 3/4 inches in height. It is compatible with both electric and gas ovens and is heat resistant. The surface coating is aluminum. This is an original piece manufactured in the United States.