Originally produced from 1963-1968, this was Anchor Hocking's attempt to make a Corningware type product.
Pyroceram is technically a brand name that encompasses several of Corning Glass Works products that include Corningware, Centura and, later, Suprema. Since their campaign for their "Corningware" product was already making use of the term "Space-Age Ceramic", Anchor-Hocking referred to theirs as "Astro-Age Ceramic". While it may be true that imitation is the most sincere form of flattery, Corning was not amused.
As a result, by 1969, Anchor was forced to pull their product from the shelves.
I own a piece of this Anchor Hocking Cookware, simply out of interest in all cooking utensils made of ceramic glass. Though I am not in possession of an X-ray powder diffractometer or anything, there are a few observations I have made regarding the Anchor Hocking product.
The particular piece I own is full of flaws from the forming of the original glass body, prior to devitrification.
The one nice thing, is the construction of the handles. Their grip-lock system is really nice for clamping the handle to the pot, but it's a little bit of a bear to release the catch.
Where is your Corningware??