Four Piece Smooth Top Range
Wards had little or nothing to do with designing this range, this is the way Tappan designed and built its first ST ranges. The idea was to keep replacement costs down if you damaged one area of the cook-top. These Tappan built ranges did not use Corning Glass for the CT surface but rather a similar glass surface from Pittsburgh Plate Glass, or PPG. The PPG CTs did not have the really smooth surface that the CG tops had, they had a very fine textured grain on the surface. And of coerce only Corning smooth top CTs had a thromostat for every surface element, this is another case of the first being by far the best ST CT, much like when Bendix introduced the Combination Washer-Dryer.
John L.