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 148,135 pages of information and 233,678 images on early companies, their products and the people who designed and built them.

J. W. and H. Platt

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Nov 1919.
Dec 1921.
1938.
1938.
1946. From The British Trade Journal. March edition.

J. W. and H. Platt Ltd. of Byron Works, Harrow.

Hacksaw blades.

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