Original 1921 electrical trade vintage magazine ad for the PITTSBURGH HIGH-VOLTAGE INSULATOR COMPANY. Main office and plant were located in Derry, PA.

Manufacturers of High-Voltage Insulators.

Legislation has been passed to make added water power development possible and the work has started. It now devolves on the engineers and manufacturers to supply the services and materials. Insulation of the transmission lines is a vital factor in maintaining service and Pittsburgh High-Voltage Insulators which have proven in actual service, so efficient, will play a big part in the new development program under way.

Has product image, illustration, description and application provide product details.

Unbound from a rare 1921 Electrical World magazine, this unique old one-page technical magazine advertisement would display beautifully matted and framed. Nice graphics. A fabulous addition to your retro electrical insulator library.