Grace's Guide is the leading source of historical information on industry and manufacturing in Britain. This web publication contains 148,344 pages of information and 233,846 images on early companies, their products and the people who designed and built them.
of Victoria Road, Willesden Junction, London, NW10. Telephone: Elgar 5911-3-4-5. Cables: "Restanza, Phone, London"
1947 British Industries Fair Advert as Manufacturers of Vi-Spring Mattress. Also "Vito" Overlay Mattress, Mattress Supports and Divans for Domestic Use, Ships, Hotels and Institutes; also Spring Seating for Railway and Public Service Vehicles. (Furniture - Section - Earls Court, 1st Floor, Stand No. 715) 
By 1975 was part of Duport
1986 Duport was acquired by Williams Holdings
Note: Now based in Plymouth, Devon, the company has its own website.