- 1Mixed UK and overseas electrical equipment layouts (GEC/2/2/4/3)
1953-1966, file - 2Equipment layout and wiring diagrams (GEC/2/2/3/6)
1960-1986, file - 3Overseas railways electrical schematics (GEC/2/2/2/178)
1933-1971, file - 4General arrangements, general outlines and seating plans (GEC/2/2/2/205)
1936-1963, file - 5Overseas railways diesel electric locomotives outline diagrams (GEC/2/2/5/10)
1948-1955, file - 6Overseas railways general outlines of Bo-Bo and Co-Co electric locomotives (GEC/2/2/2/235)
1949-1957, file - 7Overseas railways general arrangements of diesel electric locomotives (GEC/2/2/2/261)
1947-1956, file - 8Overseas railways general outlines of diesel electric locomotives (GEC/2/2/2/287)
1946-1957, file - 9New South Wales Government Railway locomotive underframe and body parts (GEC/2/2/4/28)
c 1956, file - 10General arrangement and mechanical parts for New South Wales Government Railway Co-Co electric locomotives numbers 4601 to 4640 (GEC/2/2/4/44)
1956, file - 11New South Wales Government Railway locomotive bogie casting details and arrangements (GEC/2/2/4/48)
c 1956, file - 12New South Wales Government Railways, Danish State Railways and British Rail Southern Region pantograph mechanical layout (GEC/2/2/2/453)
1955-1976, file - 13Electrical equipment arrangements for Netherlands Railway and New South Wales Government Railways (GEC/2/2/34/10)
1967-1968, file - 14Electrical equipment layouts including for New South Wales Government Railways (GEC/2/2/34/54)
1968-1969, file - 15Electrical schematics including for London Transport Board C69 surface stock, Netherlands Railway, South African Railways and Harbours and New South Wales Government Railways (GEC/2/2/34/73)
1968-1983, file