While colors and styles of decoration reflected consumer tastes at the time of production, the first thing to look at is the backstamp. On the bottom of most every genuine Pyrex opalware article is an embossed set of markings which contains a variety of information.

How can you tell if pyrex is real?

Identify Pyrex Using Markings and Stamps Use the glass markings, stamps, and logos on the pieces themselves to identify when the glass was produced. The oldest Pyrex markings should be on the bottom of glass pieces and feature Pyrex in all capital letters inside a circle with CG for Corning Glassworks.

What do the numbers on the bottom of pyrex mean?

In many but not all cases, the trailing digit of the model number corresponds to the capacity in pints of the bowl or dish, e.g. #043 = 1½ quarts = 3 pints. Sets were typically assigned catalog numbers similar to the model number sequence of the pieces they contained, e.g. a #470 set contained 1 each 471, 472, and 473.

What are the most valuable pyrex patterns?

10 Most Interesting and Rarest Pyrex Patterns EverTurquoise Diamonds.Starburst (Cinderella Serving Casserole)Pink Stems.Pink Daisy.Orange Butterprint.Golden Gooseberry.Eyes.Barcode.More items •Jun 24, 2021