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Learn the 8 basic characteristics to look for when identifying Blenko glass: Blown, Pontils, Thickness, Rims, Cold-Work, Color, Transparency, and Design Numbers.

Learn how Blenko's unique systems for assigning design numbers work. For the purpose of facilitating the taking of orders, Blenko has, since the beginning, identified each shape with a unique design number.

The only completely reliable way to identify Blenko is with the company's own original source material, their annual catalogs sent out each years to buyers to show what designs are available.

On this page you will find a listing of reproductions of vintage catalogs available for purchase. All Historic Period catalogs (1947-74) are available.

Find out what signatures and labels were used by the Blenko Glass Company and when they were used.

What constitutes a Blenko "Specialty Line?" Find out the characteristics, names and production dates of these truly special items.

This page explains and lists Blenko designs for which knock-offs (thus far all vintage) exist as well as a list of designs for which other companies' work is often mistaken.