- 1English Electric Company Limited negatives (GEC/4/4/1)
1956, file - 2English Electric Company Limited negatives (GEC/4/4/2)
1961-1974, file - 3English Electric Company Limited negatives (GEC/4/4/3)
1951-1969, file - 4English Electric Company Limited negatives (GEC/4/4/4)
1946-1957, file - 5English Electric Company Limited negatives and microfilm spools (GEC/4/4/5)
1960-1972, file - 6British Thomson-Houston Co Ltd negatives (GEC/4/4/6)
c 1907-c 1923, file - 7English Electric Company negatives (GEC/4/4/7)
c 1960, file - 8English Electric Company negatives (GEC/4/4/8)
1959-1977, file - 9English Electric Company negatives (GEC/4/4/9)
1952-1954, file - 10English Electric Company negatives (GEC/4/4/10)
1951-1952, file - 11English Electric Company negatives (GEC/4/4/11)
1953-1959, file - 12English Electric Company negatives (GEC/4/4/12)
1955-1964, file - 13British Thomson-Houston Co Ltd negatives (GEC/4/4/13)
1905-c 1924, file - 14British Thomson-Houston Co Ltd negatives (GEC/4/4/14)
1927, file - 15British Thomson-Houston Co Ltd negatives (GEC/4/4/15)
c 1920, file
