Grace's Guide is the leading source of historical information on industry and manufacturing in Britain. This web publication contains 146,010 pages of information and 231,555 images on early companies, their products and the people who designed and built them.
of Bath Road, Slough; 12 Chipston-street, W.I. (1925).
1901 Company founded.
1913 Advert for S. E. A. Ring Pistons. (Of 6 Lloyd's Avenue, London EC and 62 Robertson Street, Glasgow).
1934 Private company.
1937 Engineering specialists. "S.E.A. Ring" Gland and Piston Packings. 
1939 See Aircraft Industry Suppliers
1940 Gland packings, pistons, jointings, regulators etc
1945 Advert for S. E. A. Rings, regulators and alarms etc
1961 Manufacturers of boiler controls, liquid level controls, smoke density indicating and alarm equipment, moulded packings and seals, rubber and synthetic rubber engineering components. 700 employees.