The drawer contains aperture cards of electrical machine components sketches and drawings of tacheometer and speedometer equipment. Drawing number ranges 2040 - 23031; 23032 - 26309; SK 871614 - SK954565; SK1541246 - SK1769496; SK1817282 - SK1818402; 33304 – 37494; 40129 – 41137; 50930 – 58500; 61552 – 69899; 72403 – 74971; 87126 – 89996; 92568; 95855; 100382 – 109694; 110018 -110963; 111010 – 111365; 112403 – 124468; 127470 – 127778; 128000 – 128193; 131463 – 135940; 141742 – 147976; 156737; 163001 – 163998; 164000 – 164999; 165000 – 165990; 100382 – 109694; SK 187014; 187237; 271002 – 273726; 1015940 – 1015984; 1120019 – 1120154; 2004392 – 2416038; 3024506 – 3038804; 4046467 – 4048535; 87 and 99; 741; 1229; 2613; 9952; 12510; 20629; 22315 – 29827; 30360 – 32927.