DescriptionFlexlume Sign Corp. factory of Buffalo, NY, to Flexlume’s was a prolific sign-maker and component producer in the 20th century, particularly with regard to opal glass letter signs. The company is well known for opal glass, also known as "milk glass". These is a rare set of this type of letters. See also 2003.0006.0003, 2005.0070.0001, and 2005.0070.0002