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.
Instrument makers, of Buckingham Works, York.
of Haxby Road, York. Telephone: York 4112. Cables: "Coordinate, York". London Office: Broadway Court, Westminster
1924 Became a wholly-owned subsidiary of Vickers.
1937 Scientific instrument makers. 
1939 See Aircraft Industry Suppliers
1947 Listed Exhibitor - British Industries Fair. Manufacturers of Surveying Instruments, Theodolites, Levels, etc. Microscopes for all purposes, Biology, Pathology, Zoology, Botany, Physics, Chemistry, Petrology, Metallurgy, Stereoscopic Microscopes, Vickers Projection Microscope, Optical Measuring Instruments. (Olympia, Ground Floor, Stand No. A.1062) 
1963 Part of the new company of Vickers Instruments.
The company still exists as Cooke Optics Ltd and continues to develop camera lenses
See company web site