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 213,800 images on early companies, their products and the people who designed and built them.
of Warwick Road, Birmingham, 11. Telephone: Victoria 2147 (2 lines). Telegraphic Address: "Nerleak, Birmingham"
For a full history see Serck Radiators, of which Serck Tubes Limited is a division (with different telephone number and telegraphic address).
1937 Listed Exhibitor - British Industries Fair. Solid-drawn Tubing in all Non-Ferrous Metals, Brass, Copper, Aluminium, Bronze, Pure Tin, Gilding Metal, Phosphor Bronze. Also Channels, Angles, Sections, Shapes and Drawn Pressings. Thermostats for Radiators. (Stand No. D.614) 
1946 Patent - Improvements relating to fishing rod and like ferrules. 
1965 Patent - Heat exchangers.