- 1Mechanical details, general arrangements and wiring diagrams (GEC/2/2/2/16)
1960-1967, file - 2Wiring diagrams (GEC/2/2/2/33)
1926-1942, file - 3Power and control circuits (GEC/2/2/2/35)
1927-1959, file - 4Electrical equipment drawings (GEC/2/2/2/36)
1965-1966, file - 5Electro diesel locomotive piping and frame arrangements (GEC/2/2/2/37)
1962-1984, file - 6Roof and bogie electric conduit layout for motor coach d.c. (GEC/2/2/2/38)
1950-1951, file - 7General outline for a 1000h.p. diesel electric locomotive (GEC/2/2/2/46)
1954, file - 8Resistance frame layouts (GEC/2/2/2/51)
1962, file - 9Electrical equipment drawings (GEC/2/2/2/52)
1950-1954, file - 10Vehicle and equipment layouts for diesel and electric locomotives (GEC/2/2/2/53)
1939-1951, file - 11Equipment frames (GEC/2/2/2/54)
1952-1957, file - 12Electrical equipment details (GEC/2/2/2/55)
1954-1960, file - 13Conduit equipment drawings (GEC/2/2/2/56)
1957-1962, file - 14Control and desk frames (GEC/2/2/2/57)
1961-1962, file - 15Wiring diagrams for diesel electric locomotives (GEC/2/2/2/58)
1949-1961, file