- 1Drawing Office records (GEC/2)
1874-1994, sub-fonds - 2Engineering records (GEC/3)
1846-1993, sub-fonds - 3Reports (GEC/1/1)
1920-1993, series - 4Drawings (GEC/2/2)
1874-1993, series - 5Manuals (GEC/3/6)
1913-1984, series - 6Microfiche (GEC/4/4)
1857-c 1993, series - 7GEC Witton drawing register (GEC/2/1/1)
c 1960, item - 8General Electric Company plc drawings (GEC/2/2/9)
1930-1975, sub-series - 9Charts, schedules, traction engine outlines, diesel electric shunter elevations and schematic diagrams (GEC/2/2/9/1)
1954-1960, file - 10GEC Witton electrical equipment and wiring diagrams (GEC/2/2/9/2)
1954-1956, file - 11GEC Witton electrical equipment and wiring diagrams including for the Manchester-Sheffield-Wath electrification (GEC/2/2/9/3)
1949, file - 12GEC Witton electrical equipment and wiring diagrams including for Victorian Railways and South African Railways and Harbours (GEC/2/2/9/4)
1950-1958, file - 13GEC Witton electrical equipment and wiring diagrams including for British Railways, South African Railways and Harbours, Potugal Railways, and Ceylon Government Railways (GEC/2/2/9/5)
1950-1953, file - 14GEC Witton electrical equipment and wiring diagrams (GEC/2/2/9/6)
1960-1962, file - 15GEC Witton electrical equipment and wiring diagrams (GEC/2/2/9/7)
1959-1961, file
