Insulators Home > Insulator Styles > Glass > Threaded > CD 247.3
Included in the May 2002 issue of Crown Jewels of the Wire was a photo of the newly-discovered CD 247.3 style (and embossing close-up) of Locke patent insulator, produced by Corning Pyrex.
Insulators Home > Insulator Styles > Glass > Threaded > CD 247.3
Contact: A.C. Walker