- 1Diesel electric locomotives mechanical arrangements (GEC/2/2/2/63)
1937-1960, file - 2Electrical connection and schematic diagrams (GEC/2/2/2/73)
1937-1938, file - 3Mechanical details (GEC/2/2/2/131)
1950-1966, file - 4Diagram of connections (GEC/2/2/2/150)
1932-1951, file - 5Wiring diagram of connections (GEC/2/2/2/151)
1949-1966, file - 6Diagrams of connections and wiring diagrams (GEC/2/2/2/156)
1945-1951, file - 7Equipment arrangements and welded assemblies (GEC/2/2/2/158)
1952 -1958, file - 8Diagrams of connections and control circuits (GEC/2/2/2/167)
1922-1932, file - 9General arrangements for Post Office (London) Railway and overseas railways (GEC/2/2/2/179)
1947-1975, file - 10New Zealand Railways bogie arrangements and drawgear details (GEC/2/2/5/4)
1954-1955, file - 11Mechanical layouts for overseas railways (GEC/2/2/2/204)
1954-1965, file - 12Overseas railways frame arrangements, buffer beams and other mechanical details (GEC/2/2/5/8)
1950-1955, file - 13Diesel electric locomotive general outlines for overseas railways (GEC/2/2/2/224)
1949-1953, file - 14New Zealand Railways Class DM & D electric coaches and bogies general and mechanical arrangements (GEC/2/2/2/243)
c 1940, file - 15New Zealand Government Railways Class Ew electric locomotives mechanical parts (GEC/2/2/7/7)
c 1951, file