Grace's Guide is the leading source of historical information on industry and manufacturing in Britain. This web publication contains 148,470 pages of information and 233,895 images on early companies, their products and the people who designed and built them.
John Tonks and Co of Central Spring and Steel Works, Furnace Hill, Sheffield.
1919 Advert as manufacturers of springs and spring-washers. Of Daisy Steel and Spring Works, Daisy Walk, Sheffield. 
1937 Spring manufacturers. 
1940 Advert. Springs and spring washers. 
1945 Advert. Springs and spring washers. 
1960 Advert. Springs and spring washers.