Grace's Guide is the leading source of historical information on industry and manufacturing in Britain. This web publication contains 139,000 pages of information and 225,313 images on early companies, their products and the people who designed and built them.
The A. T. Speedometer Co of 140 Longacre, London
1913 April. Advert for speedometer 
1916 Company listed to be wound up under the Trading with the Enemy Act. '165. A. T. Speedometer Co., Limited, 140, Long Acre, London, W.C., Manufacturers of Speedometers. Controller: F. G. van de Linde, 4, Fenchurch Avenue, London, E.C. 24 May 1916.'