Grace's Guide is the leading source of historical information on industry and manufacturing in Britain. This web publication contains 147,145 pages of information and 233,396 images on early companies, their products and the people who designed and built them.
of Solar Works, Birmingham.
1898 The company was registered on 15 December, to acquire the business of manufacturers of electricity meters, dynamos etc of a company of the same name. 
1927 Recorded as being a subsidiary of GEC
1968 The combination of SEI and Chamberlain and Hookham with AEI operations at Motherwell, Harlow and Manchester was expected to make a strong base for competing in meters, instruments and components