Grace's Guide

British Industrial History

Grace's Guide is the leading source of historical information on industry and manufacturing in Britain. This web publication contains 148,535 pages of information and 233,960 images on early companies, their products and the people who designed and built them.

Elmer A. Wall

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1933. From Model Engineer and Practical Electrician of 31st August.
November 1934.

5900, N. Fairfield Avenue., Chicago III.

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