Grace's Guide is the leading source of historical information on industry and manufacturing in Britain. This web publication contains 148,502 pages of information and 233,941 images on early companies, their products and the people who designed and built them.
of 39 Victoria Street, London, SW1
James Elphinstone Baty was senior partner.
1937 Precision engineers. "Mercer" Dial Gauges, Measuring and Inspection Equipment. 
1939 See Aircraft Industry Suppliers
1940 Advert. Dial gauges. 
1943 J. E. Baty and Co was incorporated as a private company
1945 Advert. Mercer dial gauges and measuring equipment. 
1960 Advert. Dial gauges. 
1985 The business was carried on by W. W. Andrews at 39 Victoria St., London
1986 Name changed to Baty International
1994 Name changed to Quality Measurement Ltd