Porcelain Insulator Common Search Association Appraisal

Vintage Frosted Glass Electrical Insulator

This item is a vintage electrical insulator, a utilitarian object designed for mounting on power poles to prevent electrical current from leaking into the support structure. It is constructed from thick, heavy-duty molded glass with a distinctive frosted or satin finish, which gives it a translucent, pale seafoam-green or white appearance rather than being perfectly clear. The object features a cylindrical body with a rounded, dome-shaped top and a deep horizontal groove wrapped around the middle, traditionally intended for securing a wire. The interior is hollowed with a threaded core to allow it to be screwed onto a wooden or metal peg. Physically, the piece appears to be approximately 3 to 4 inches tall. While no specific maker's marks are legible due to the camera angle and the matte texture of the glass, these items were commonly produced by manufacturers such as Corning, Hemingray, or Whitall Tatum during the mid-20th century. The condition shows significant surface wear consistent with age and industrial use; the frosting appears somewhat uneven, likely due to prolonged exposure to elements and handling. There are no major visible fractures or structural chips shown, though minor flea-bite nicks along the base and wire groove are typical for such authentic industrial artifacts. Its robust construction and utilitarian aesthetic make it a popular collectible in the Americana and industrial decor market.