Original 1943 electrical trade vintage ad for OHIO BRASS COMPANY.  Main office and plant was located in Mansfield, OH.

Manufacturers of Insulators.

Why hope for definite strength when you can get it by specifying O-B Suspension Insulators.

Every O-B insulator is individually rated for strength of the minimum unit, and the rating is permanently marked on the cap. Not one O-B unit will fall below this value. Practically all will  be above it.  In 1978, Hubbell, Inc. purchased the Ohio Brass Company.

Unbound from a 1943 electrical engineering magazine, this unique old one-page advertisement would display beautifully matted and framed. Nice graphics. World War 2 propaganda. A fabulous addition to your retro electrical library.