- 1Control and steering gear arrangements (GEC/2/2/2/594)
1940-1942, file - 2Camshaft layouts, equipment frames and schedules of ships officers drawings (GEC/2/2/2/598)
1940-1944, file - 3Marine control steering gears (GEC/2/2/2/621)
1940-1942, file - 4Marine dynamo pool cable changing boxes, motor connection boxes and details including for South Indian Railway (GEC/2/2/2/632)
1930-1959, file - 5HA./LA. Mark 3 and Mark 4 GB director contactor cases (GEC/2/2/2/652)
1941-1943, file - 6Layout of tracked hovercraft and other mechanical arrangements (GEC/2/2/34/35)
1968, file