Original 1943 electrical trade vintage ad for JOHN C DOLPH COMPANY.  Main office and plant was located at 166-8 Emmett Street, Newark, NJ.

Manufacturers of Insulating Varnishes and Compounds.

A Drop of Protection.

This little drop with billions of others, taken collectively, forms the impervious film which protect the giant transformers, generators and motors of American industry as well as the special electrical units required by our Armed Forces. Such is insulating varnish, although only a few mils thick, it provides the necessary protection to electrical units.

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.