Numbers seen on pieces other than the model number are related to molding operations only and have no significance as to pattern, color, item, or dating.
Model numbers should not be confused with pattern numbers or item/catalog numbers, neither of which appear physically on pieces.
Slight modifications to design or capacity were often not enough to result in a model number change.
an open stock 475 casserole numbered 485.
Some sets consisted of a single dish (with lid), the catalog number of which differed from the model number of of the item, e.g.
Sets were typically assigned catalog numbers similar to the model number sequence of the pieces they contained, e.g.
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.
PYREX DISHES CODE
A 9 replacing the leading zero of a dish model number and followed by a color code or pattern number suffix was typically used as a catalog number for a single dish and lid set.
The divided lid for the 063 divided oval casserole is marked 945, the same as the undivided lid for the 045.
943 and 945 for 043 and 045 casseroles, respectively.
Oval casserole lids are numbered the same whether clear or opal, e.g.
Model numbers for round Cinderella casserole lids differ depending on whether they are clear or opal, with 470C, 474C and 475C used for clear lids and 20C, 24C and 25C used for opal lids.
On pieces themselves, the model number will sometimes be followed by "-B" on bowls or "-C" on covers.
Some model numbers have a leading zero, but it does not appear to be significant.
Numbers from older, discontinued pieces were sometimes recycled and used on new, unrelated pieces.
Model numbers did not appear on the earliest color ware pieces.
In parentheses after each are the lid numbers which fit the corresponding dish or bowl. Look for it above the trademark on bowls and dishes, and on the handles or rims of lids.īelow is a listing of model numbers of the most often-seen pieces of vintage Pyrex kitchenware, which may be helpful for identification purposes. Model numbers are also useful in that they provide collectors with a common language, a frame of reference, and even a shorthand when speaking about Pyrex ware.Įach shape and size of Pyrex Ware was assigned a model number, which is typically embossed somewhere on the piece. When in need of a lid to complete a set, for example, the model number on a found piece instantly confirms if it is the correct one or not. Being knowledgeable about model numbers can be invaluable to the Pyrex collector.
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