Grace's Guide is the leading source of historical information on industry and manufacturing in Britain. This web publication contains 148,464 pages of information and 233,889 images on early companies, their products and the people who designed and built them.
of 111 Salisbury Road, Kilburn, London, NW6.
1937 Petrol pump manufacturers. "Avery-Hardoll" Petrol Pumps. 
1952 Patent - Improvements in or relating to liquid measuring and dispensing apparatus.
1955 of Chessington (see advert)
1961 Manufacturers of petrol pumps and engineering products for use in the automobile, aviation and ancillary industries. 700 employees. 
1979 W. and T. Avery was acquired by GEC
1982 Patent - Fluid Measuring System.