- English Laboratory Induction Coil, c. 1900...
- Demonstration Model of an Early Electric Moto...
- French Experiment Box for Demonstrating Elect...
- Measuring Bridge by Siemens & Halske, c. 1890...
- Gebrüder Kaiser Alternating Current Electric ...
- Measuring and Laboratory Equipment, c. 1910 o...
- Power Factor Measuring Instrument by Brown, B...
- Group of Physical Demonstration Models, c. 19...
- Large Current Converter by Brägestu, c. 1925...