Grace's Guide is the leading source of historical information on industry and manufacturing in Britain. This web publication contains 133,393 pages of information and 211,464 images on early companies, their products and the people who designed and built them.
of 19-20 Red Lion Street, Clerkenwell, London, EC1. Telephone: Clerkenwell 4063. Cables: "Perflexoph, London"
1929 Advert in British Industries Fair Catalogue as an Optical, Scientific and Photographic Exhibit. Manufacturers of high-grade Ophthalmic Lenses of all kinds, particularly solid Bifocals, Lens Mouldings, Optical Machinery and Precision Tools. (Scientific Section - Stand No. N3) 
1936 Amalgamated with United Kingdom Optical Co.