Grace's Guide is the leading source of historical information on industry and manufacturing in Britain. This web publication contains 143,370 pages of information and 230,032 images on early companies, their products and the people who designed and built them.
of 111 Salisbury Road, Kilburn, London, NW6.
An Anglo-French company
1937 Petrol pump manufacturers. "Avery-Hardoll" Petrol Pumps. 
1952 Patent - Improvements in or relating to liquid measuring and dispensing apparatus.
1961 Manufacturers of petrol pumps and engineering products for use in the automobile, aviation and ancillary industries. 700 employees. 
1982 Patent - Fluid Measuring System.