- 1Post Office (London) Railway electric wagon details (GEC/2/2/2/140)
1930-1969, file - 2General outlines of diesel electric locomotives (GEC/2/2/2/241)
1958-1962, file - 3Diagrams of connections for a 200 h.p. diesel electric shunting locomotive (GEC/2/2/26/1)
1958, file - 4Components for diesel electric locomotives type 1 and 2 (GEC/2/2/26/2)
1956-1965, file - 5Wheel, axle and tyre assembly and motor bogie arrangements (GEC/2/2/1/91)
1975-1979, file - 6Diesel electric locomotives type 5 mechanical parts (GEC/2/2/2/257)
c 1960, file - 7New Zealand Railways mainline D.E. locomotive (GEC/2/2/2/258)
c 1951, file - 8Keretapi Tanah Melayu (Malayan Railways) general mechanical parts arrangements (GEC/2/2/2/260)
1970, file - 9Overseas railways general arrangements of diesel electric locomotives (GEC/2/2/2/261)
1947-1956, file - 104-6-0 3 cylinder engine arrangements (GEC/2/2/5/19)
1926-1952, file - 11Electrical details and mechanical parts (GEC/2/2/2/262)
1957-1958, file - 12Frame, bunker, drilling and piping arrangements (GEC/2/2/2/264)
1944-1950, file - 13Mechanical details (GEC/2/2/2/265)
1951-1963, file - 141500h.p. diesel electric locomotive diagrams (GEC/2/2/2/266)
1951-1952, file - 15Electro-diesel mechanical parts (GEC/2/2/2/269)
1957-1964, file
