Charles Edward Slinn (1880-1955) was a spring knife cutler, who was born in Sheffield, the son of Charles Slinn and his wife, Sarah.  Charles Sen. was a brass turner and tape measure maker from Hathersage. Given the family’s address in Sheffield (Pearl Street), it seems likely that he worked for Chesterman’s, the renowned measuring tape manufacturer.

By 1911, Charles Edward was a spring-knife cutlery manager. In the early 1920s, he started his own firm, which was listed as C. Slinn & Co, spring knife manufacturer, Fitzwilliam Lane. It operated at that address until the early 1950s.  Charles Edward Slinn, of 40 Rosedale Road, died on 22 July 1955, leaving £934.