Grace's Guide is the leading source of historical information on industry and manufacturing in Britain. This web publication contains 143,401 pages of information and 230,040 images on early companies, their products and the people who designed and built them.
L. A. Rumbold and Co of Kingsgate Place, Kilburn, London, NW6
1937 Aircraft upholsterers. 
1939 See Aircraft Industry Suppliers
presumably later became a subsidiary of Britax International