Grace's Guide is the leading source of historical information on industry and manufacturing in Britain. This web publication contains 134,742 pages of information and 213,795 images on early companies, their products and the people who designed and built them.
1921 See advert
1927 The Xcel appliances were marketed by Siemens Electric Lamps and Supplies (see adverts)
1933 Xcel (All British) Flange Connector.