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 136,369 pages of information and 219,137 images on early companies, their products and the people who designed and built them.

Heather Filters

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April 1947.
December 1948.
February 1948.
October 1952.

Heather Filters Ltd. of St. James's Place, London.

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