- 1Tram bulkhead fittings, cross section of tramway track, floating spindle buffer, trolley boom, lightweight railess trolley base arrangement, diagram of connections (GEC/2/2/2/302)
1938, file - 2Diesel mechanical rail car general outline (GEC/2/2/2/303)
1944, file - 3Mechanical parts for a double bogie electric locomotive (Bombay Baroda), electric locomotive (Punjab), four wheel trolley locomotive (Blackpool Corporation), Rhodesia Railways electric locomotive, trolley locomotive (Scottish Oils), trolley locomotive (Mount Lyell), 28 ton battery electric loco (Aberdeen) and a battery electric loco (Peterborough) (GEC/2/2/33/2)
1927-1930, file - 4Electric battery and trolley locomotive mechanical parts (GEC/2/2/33/3)
1930-1931, file - 5General arrangements and mechanical parts for maximum traction trucks, a Bombay double deck motor car, a single deck tramcar & trailer, and a flexible yoke truck (GEC/2/2/2/401)
1933-1949, file - 6C.D.B.2 controllers and switches (GEC/2/2/2/515)
1928-1934, file - 7Controllers (GEC/2/2/2/605)
1929-1943, file - 8Tramway controllers (GEC/2/2/2/622)
1920-1989, file - 9Pantographs, trolleys and collector shoes (GEC/2/2/2/647)
1928-1935, file - 10Equipment assemblies including speedometers (GEC/2/2/2/648)
1946-1960, file - 11Connection boxes (GEC/2/2/2/649)
1934-1976, file - 12London Docklands proposals, Blackpool tramway equipment and Quest 80 for Sigma trolley battery hybrid bus project files (GEC/1/3/13)
1980-1984, file - 13Melbourne and Metropolitan Tramways Board all-electric trams and South African Railways and Harbours 10E locomotives project files and technical files (GEC/1/3/15)
1965-1985, file - 14Metropolitan-Vickers Electrical Co Ltd tender specifications (GEC/3/10/23)
1921-1922, file - 15Metropolitan-Vickers Electrical Co Ltd tender specifications (GEC/3/10/24)
1924-1954, file
