Original 1943 electrical trade vintage ad for STRUTHERS-DUNN, INC.  Main office and plant was located at 1321 Arch Street, Philadelphia, PA.

Manufacturers of Relays and Timers.

The New Dunco Catalog and Relay-Timer Data Book. 

Just Out! Design, engineering and catalog data on the nation's most complete line of quality relays and timers including many types for war requirements. Far more than a catalog, the new Dunco Relay-Timer Book is a complete guide to relay selection and usage.

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