Vintage Glass Telegraph Insulator Teal No 40 Hemingray Made In USA

Manufacturer and History: Hemingray Glass Company was a prominent and prolific manufacturer of glass insulators, among other glass products, and the No. 40 style was a common design produced from approximately 1910 to 1921 Characteristics: These insulators are typically made of glass, often found in shades of aqua, teal, or green, and feature a distinctive threaded interior for attachment to a pin on a utility pole Were made in Muncie Indiana 4”x 4.25”

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• Listed Jul 15, 2025