From a 1941 Clough-Brengle catalog

From "Radio Engineering" magazine

November, 1932

Clough-Brengle

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This is a view inside the Clough-Brengle factory located at 5501 Broadway, Chicago Ill.

This is a view of the Clough-Brengle factory located at 1134 West Austin Ave, Chicago Ill.

This is the Clough-Brengle factory located on West 19th Street, Chicago Ill.

The founders, Kendall Clough & Ralph Brengle

These are 2 views inside the West 19th Street factory.

From Radio Industries, June 1930