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 143,348 pages of information and 230,027 images on early companies, their products and the people who designed and built them.

Wotan

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January 1912.
October 1912.
November 1912.
December 1912.
March 1913.

Electrical lamps, a product of Siemens Brothers and Co

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