‘NEVASTAIN’ was one of the earliest stainless cutlery marks and it would appear to date this knife to 1920. In that year, ‘NEVASTAIN’ cutlery was widely advertised by the Sheffield firm, British Table Requisites Ltd. However, the name disappeared on Sheffield cutlery after that single year – perhaps because the orginator of stainless steel (Thomas Firth & Sons Ltd) tied up the patent rights and insisted on the use of ‘FIRTH STAINLESS’. The identity of Pearson’s is unclear. The likeliest candidate would seem to be S. Pearson & Co Ltd, though there were several cutlery retailers named Pearson in the UK at that time (for example, at Eastbourne, Norwich, and Nottingham).