Extremely Rare Piece of the Vintage Corning Ware With Model Number. Extremely Rare Piece of the Vintage Corning Ware With Lid and With Model Number – Hello From 1972’s. Original Corning Ware saucepan with the’ Blue Cornflower’ decoration. Corning Ware revolutionized from 1958 – 1977′ s kitchen and the original pieces are now considered to be highly collectible. Model Number A – is for post for 1972 Corning Ware, when they strengthened the sides and widened the handles, the lids have a larger knobs too. The stamped will be embossed under the handle. The was originally a brand name for a unique glass-ceramic. Designer:’Blue Cornflower’ pattern designed by Joseph Baum, an artist at the Charles Brunelle Advertising Agency in Hartford, Connecticut. Corning Ware was originally a brand name for a unique glass-ceramic cookware resistant to thermal shock. First introduced in 1958 by Corning Glass Works in the United States, Corning Ware can be taken from the refrigerator or freezer and used directly on the stovetop, oven or microwave, or under a broiler. Attractive for serving at the table and dishwasher safe. Donald Stookey of the Corning Research and Development Division discovered Pyroceram, a white glass-ceramic material capable of withstanding a thermal shock of up to 450 K (840 °F), by accident. He was working with photosensitive glass and placed a piece into a furnace planning on heating it to 600 degrees Fahrenheit. When he checked on his sample, the furnace was at 900 degrees and the glass had turned milky white. He reached into the furnace with tongs to discard the sample, and it slipped and hit the floor without shattering. Pyroceram was originally used in the ballistic missile program as a heat-resistant material for nose cones. Glass-ceramics are polycrystalline materials produced through controlled crystallization of base glass, producing a fine uniform dispersion of crystals throughout the bulk material. Crystallization is accomplished by subjecting suitable glasses to a carefully regulated heat treatment schedule, resulting in the nucleation and growth of crystal phases. Pyroceram is the original glass-ceramic material developed and trademarked by Corning Glass in the 1950s. Pyroceram is an opaque, white, glass material, commonly used in kitchenware, glass stove tops, wood stove doors, etc.. It has high heat tolerance and low thermal expansion. Model Number: A – 10 – B (embossed under the handle). Marked: Corning Ware, Made in USA. Marked: Pyrex on the top of the Lid. Condition: Good – In very good vintage condition.