Stainless & Rustless Steel Co Ltd [S&RS] was registered at Companies House on 19 October 1915 and listed as a ‘private company with share capital’ (£1,000). It was a subsidiary of Brown Bayley’s Steel Works Ltd, which was a major Sheffield steel manufacturer in the Don Valley. The directors of S&RS were Robert Armitage (Brown Bayley’s chairman), Harry Brearley, and Max Reyner Mainprice. Brearley was the inventor of stainless steel for cutlery, who had joined Brown ....