Grace's Guide is the leading source of historical information on industry and manufacturing in Britain. This web publication contains 146,047 pages of information and 231,597 images on early companies, their products and the people who designed and built them.
of 109-139 Sarehole Road, Hall Green, Birmingham, 28. Telephone: Birmingham, Springfield 3343-4-5. Cables: "Optical". (1947)
Post-WWI: the company was awarded £3,500 by the Royal Commission on Awards to Inventors in respect of communication to the US government of inventions, designs, etc in relation to aircraft and aircraft accessories, specifically the Aldis unit sight
1937 Manufacturing opticians. 
1947 British Industries Fair Advert for Epidiascope and Dual Purpose Projector. Manufacturers of Epidiascopes, Strip Projectors, Visual Aids for Educational Purposes, Photographic Enlargers, Daylight and Masthead Signalling Lamps. (Scientific and Optical Section - Olympia, Ground Floor, Stand No. E.1797) 
1949 Patent - Improvements in and relating to lamp-signalling apparatus. 
1958 Patent - Light projection apparatus.