Grace's Guide is the leading source of historical information on industry and manufacturing in Britain. This web publication contains 133,426 pages of information and 211,652 images on early companies, their products and the people who designed and built them.
of 12 King Street, Cheapside, London, EC2. Telephone: City 3641. Cables: "Duplicator, Cent, London". (1929)
of Astor House, Aldwych, London, WC2. Telephone: Holborn 3211. Cables: "Duplicator, Estrand, London". (1947)
1891 Company founded.
1910 Private company.
1929 British Industries Fair Advert for Duplicators. Manufacturers of Duplicators, Rotary and Flat, Stencils for use on all Duplicators, Ink for use on all Duplicators, Carbon Paper for every purpose, Typewriter Ribbons and Inked Ribbons for all Machines. (Stationery Section - Stand No. R.154) 
1947 Listed Exhibitor - British Industries Fair. Manufacturers of Duplicating Machines Carbon Paper of all descriptions, Typewriter and other Inked Ribbons, Duplicator Stencil Sheets and Duplicator Inks, etc. (Olympia, Ground Floor, Stand No. B.1434) 
1947 Company made public.
1956 Patent - Improvements in or relating to copying processes. 
1957 Patent - Improvements in or relating to copying processes. 
1961 Manufacturers of duplicators, stencils, carbon papers and ribbons, of Watford, Herts.