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 137,459 pages of information and 221,559 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.
1946. From The British Trade Journal. March edition.

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

Hacksaw blades.

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