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 148,478 pages of information and 233,901 images on early companies, their products and the people who designed and built them.

Arthur Preen and Co

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December 1933. Formo.
December 1934. Warmo.
January 1936.

Maker of Formo and Warmo heating appliances, of Crown Works, Cricklewood Lane, London, NW2.

1929 Listed Exhibitor. Manufacturers of Variable Condensers including Special Short Wave, Formo-Densor, L.F. Transformer, Combination L.F Amplification Units, "Dual Impedance", "Resistance-Transformer", Transformer output filter "Choke". Valve Holders, Coils, Publications: "L.F. Amplification", "Screened Grind Three". (Stand No. MM.67) [1]

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