Grace's Guide is the leading source of historical information on industry and manufacturing in Britain. This web publication contains 142,982 pages of information and 229,205 images on early companies, their products and the people who designed and built them.
Ensign Lamps Ltd of Kent Street Works, Preston, Lancashire. Telephone: 4628. Telegraphic Address: "Ensign, Preston"
1935 Patent - Improvements in and relating to caps for incandescent electric lamps.
1937 Listed Exhibitor - British Industries Fair. All types of Lamps, from15 to 1,000 watts. Display of the world's strongest Lamp, "Ensign" Double-wreath Traction Lamp. Display of "Ribble" Shilling Lamps, another production of Ensign. (Stand No. A.607) 
1943 Acquired by E. K. Cole.