Grace's Guide is the leading source of historical information on industry and manufacturing in Britain. This web publication contains 135,172 pages of information and 215,041 images on early companies, their products and the people who designed and built them.
Norman Isherwood and Co., Ltd. of Bolton, Lancs.
Manufacturers of radiator tube.
1968 (sic) The name was changed to Norman Isherwood Ltd.
c.1973 became part of IMI Group