Grace's Guide is the leading source of historical information on industry and manufacturing in Britain. This web publication contains 148,151 pages of information and 233,681 images on early companies, their products and the people who designed and built them.
of 77 St. Helens Gardens, North Kensington, London, W10. Telephone: Park 3058. (1929)
of 989-995 High Road, North Finchley, London, N12. Telephone: Hillside 5007. Cables: "Opening, Norfinch, London." (1947)
1929 Listed Exhibitor British Industries Fair. Manufacturers of Eyeglasses, Spectacles, Tortoise-shell and Imitation Shell Spectacle Frames, Lenses and Prisms for Eyeglasses and Spectacles, Cases for Eyeglasses and Spectacles, small pocket Magnifiers and Microscopes. (Stand No. N.21) 
1947 Listed Exhibitor - British Industries Fair. Manufacturers of an inexpensive series of Microscopes for Students under the registered design and trade mark "Eclipse", Pencil Microscopes, High Quality Readers, Duomags and various other Magnifiers. (Olympia, Ground Floor, Stand No. D.1648)