Last Updated: May 01, 2020     Views: 458

Thank you for your question! The Museum cannot offer values or appraisals due to our non-profit status, but there are collectors' books and magazine articles that may be of interest to you in the Library collection. I'm listing a few below. The Library also has historical information on Pyrex insulators.

You could also contact one of the collector's groups for insulators, such as Crown Jewels of the Wire. They publish a newsletter, where some of the articles listed below appear. These groups typically do a lot of research on numbers, marks, dates, etc. and could save you some leg-work!

Books and Articles:

Borrowing Library Materials

The Rakow Research Library will lend designated books from its collection and will send copies of articles on request from other libraries via Interlibrary Loan (ILL). Contact your local library to make ILL requests. For more information about our ILL policies and procedures, please see

A more extensive list of resources is available upon request. Please let us know if we can be of further assistance via Ask a Glass Question ( or by email ( or phone (607-438-5300).


Feel free to contact us with glass-related questions in the future!




Ask a Glass Question

Ask a Glass Question

Please note: The Corning Museum of Glass is a non-profit, educational institute and, as such, cannot answer questions about rarity or value of your glass. For more information about appraisal services, see our curatorial FAQs.

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