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 148,139 pages of information and 233,680 images on early companies, their products and the people who designed and built them.

E-T-A Circuit Breakers

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of Aylesbury

1948 Founded by Jakob Ellenberger and Harald A. Poensgen and has been owned by their families since.

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