Grace's Guide is the leading source of historical information on industry and manufacturing in Britain. This web publication contains 133,427 pages of information and 211,664 images on early companies, their products and the people who designed and built them.
of 82 St. Thomas Street, London, SE1. (1922)
of Britannia Pencil Works, Neasden, London, NW10. Telephone: Willesden 2407-8. Cables: "Omnimodus, London". (1929)
1920 the Royal Sovereign Pencil Company was formed by amalgamation of two of the leading pencil manufacturers in England, B. S. Cohen and E. Wolff and Sons. The first managing director was Mr. Arthur Johnson
1922 Listed Exhibitor British Industries Fair. Manufacturers of the "Royal Sovereign," "Bank of England," "Spanish Graphite," "Imperial," "Alexandra," and all kinds of Blacklead, Carbon and Coloured Pencils, Crayons and Chalks. (Stand No. K.153) 
1926 On the death of Arthur Johnson, Mr. Percy Charnaud succeeded as managing director
1929 Listed Exhibitor - British Industries Fair. Manufacturers of Royal Sovereign Pencils, Bank of England, Spanish Graphite, Blacklead and Coloured Pencils, Pencils for writing on glass, china and all highly polished surfaces, Pastels, Crayons, and Penholders. (Stand No. R.26) 
1938 Patent - Improved construction of box or carton.
1940 Patent - Improvements in and relating to cases, cartons and the like.