I recently acquired 13 Aladdin Old Style Heelless lamp chimneys from an old collecter. Three were signed  Pyrex Brand Chimney Made in the USA for Aladdin Indrustries Inc. This is one of the 10 chimneys that are unsigned and measure 12 1/2" tall with 2 5/8" fitter end. The condition is very good with no chips or cracks or cloudiness.