- 1Wiring diagrams (GEC/2/2/2/148)
1959-1967, file - 2Mechanical layouts for overseas railways (GEC/2/2/2/204)
1954-1965, file - 3Overseas railways general arrangements of diesel electric locomotives (GEC/2/2/2/261)
1947-1956, file - 41500h.p. diesel electric locomotive diagrams (GEC/2/2/2/266)
1951-1952, file - 5Overseas railways mechanical details and wiring diagrams (GEC/2/2/2/295)
1951-1953, file - 6Frame arrangements and equipment outlines for a DE and DH prototype locomotive, mechanical details for a British Transport Commission 1000hp locomotive and for Buenos Aires & Pacific Railway, Great Western Brazil Railway, Tasmanian Railway and New Zealand Railways (GEC/2/2/2/305)
1950-1959, file - 7Mechanical parts for overseas railways (GEC/2/2/2/324)
1953-1955, file - 8Mechanical parts for overseas railways (GEC/2/2/2/330)
1948-1956, file - 9Mechanical parts for Tasmanian Government Railway, RENFE and Queensland Government Railways (GEC/2/2/2/338)
1949-1952, file - 10Diesel electric shunting locomotive axlebox arrangements, general outlines and general arrangements amongst mechanical parts for the overseas railways of Tasmania, Australia, Brazil, Egypt, New Zealand, and Portugal (GEC/2/2/2/344)
1945-1954, file - 11Mechanical parts for Central Argentine Railway, Great Indian Peninsula Railway and Queensland Government Railways and mechanical details for the DH & DE prototype locomotives (GEC/2/2/2/348)
1951-1958, file - 12Overseas railways painting diagram and number plates for 1000hp electric locomotives (GEC/2/2/5/64)
1948-1957, file - 13Mechanical parts for Tasmanian Government Railways, RFDN, Brazil, Queensland Government Railways, Egyptian State Railways and DH & DE prototype locomotives (GEC/2/2/5/68)
1947-1952, file - 14Mechanical parts for the British Transport Commission DE & DH prototype locomotives and for overseas railways locomotives including Queensland Government Railway, Central Argentine Railway, Nigerian Railway, Buenos Aires & Pacific Railway, Great Western Railway and RFDN (Brazil) (GEC/2/2/5/70)
1952-1956, file - 15Mechanical parts for locomotives for Egyptian State Railways, Tasmanian Government Railways, and Queensland Government Railways (GEC/2/2/5/71)
1946-1958, file