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Crittall Manufacturing Co of Manor Works, Braintree
1883 Company established.
1899 Private company.
1914 Manufacturers of steel products. Employees 600. 
1924 Company made public.
1947 Crittall-Luxfer Aluminium Windows Ltd was formed as a private company to acquire the aluminium window interest of Crittall Manufacturing Co and Luxfer Ltd based on the latter's foundry at Colwick and using part of Crittall's Braintree factory 
1951 Annual meeting told of substantially increased export business. Amongst other developments, Crittall-Hope (Rhodesia) Ltd had been formed which was a venture in partnership with Henry Hope and Sons, John Thompson Beacon Windows, Porters Industrial Enterprises Ltd and Crittall-Hope Metal Windows (South Africa) Ltd.
1961 Manufacturers of metal windows, doors, casements, agricultural and horticultural equipment. 
1962 Disposed of interest in Luxfer as its product range was increasingly different from the rest of the group. Other trading interests included Crittall-McKinney Metal Window Co Ltd in Belfast, Crittall Silos, Darlington and Simpson Rolling Mills, and several overseas subsidiaries
1965 Merger of Crittall Manufacturing Co and Henry Hope and Sons to form Crittall-Hope escaped reference to the Monopolies Commission because the proposals stemmed from before the Commission was established, even though the combine would have 40 percent of the UK market for metal-framed windows