Grace's Guide is the leading source of historical information on industry and manufacturing in Britain. This web publication contains 148,100 pages of information and 233,633 images on early companies, their products and the people who designed and built them.
of Broom Street, Sheffield 10; of 112-116 Rockingham St., Sheffield.
1849 William Pryor bought the business of William White, mark maker, to whom his son Edward Pryor was then apprenticed.
The business developed for the hand-cut manufacture of marking punches for the Sheffield cutlery trade.
1937 Marking devices. 
1940 Advert. Interchangeable steel type for marking. 
1945 Advert. Marking methods and devices.