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Gramme System Machine, c. 1880...
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Elster & Geitel System High-Tension Transform...
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Leybold DC Electric Motor...
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Early AEG Electric Motor, c. 1890...
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Group of Electric Measuring Instruments...
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Electromagnetic Rotating Motor, c. 1860...
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Electromagnetic Motor, c. 1890...
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"Improved Magneto-Electric Shock Machine", c....
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2 Small Toy Motors, c. 1920...
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Electromagnetic Motor with Pump, c. 1880...
