The mark ‘Firth Brearley Stainless’ would suggest that this knife was made in the early 1920s. Since the name ‘O. Walker & Sons’ was not listed in any Sheffield directory, it is likely that the knife was manufactured in Sheffield for a retailer. A strong candidate is Oswald Walker & Sons, a wholesale dealer in cutlery and electro-plated goods, which was based at Bradford. The founder was Oswald Walker (1861-1935), who had been born at Thirsk and first traded in Whitby jet orn....