1 folder, containing: 15 technical drawings by British Thomson-Houston and 1 letter from BT-H to The British United Shoe Machinery Co. relating to panels for a jig borer and a BT-19 Thyratron Valve, 1954-1959; 4 operating schematic drawings relating to a Kearns Borer, c.1960; 4 items consisting of operating notes and component lists, c.1960; 1 pro forma English Electric Valve Company valve service report form, c.1960; 1 H W Kearns & Co. Ltd brochure for Horizontal Surface Boring and Milling Machines, in English and German, c.1960; 1 Philips Electrical Ltd leaflet providing assembly instructions for "Streamlite" attachments, c.1955.