'National' portable typewriter No 5, by the National Typewriter Company, Wisconsin, United States of America, 1916 'National' portable typewriter No 5 1916-1920
Fine art reproduction printed from flat gravure plate, 1904 Fine art reproduction printed from flat gravure plate
Photo matrix of a letter 'S' from a Diatronic "S" photosetting machine, by H. Berthold AG, Berlin, German, 1970-1985 Photo matrix of a letter 'S' from a Diatronic "S" photosetting machine
(In box 15.) Litho plate and corresponding negative, p.2 of Daily Telegraph, 29 September 1986, the first litho run of the paper in London (In box 15.) Litho plate and corresponding negative