Original 1943 electrical trade vintage ad for GENERAL RADIO COMPANY.  Main office and plant was located in Cambridge, MA

Manufacturers of Standard-Signal Generators.

Since General Radio pioneered the first commercial standard-signal generator in 1928, it has been the aim of our design engineers to make available signal generators for testing all types of home, commercial and military receivers.

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.