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Bright High-Wattage Light Bulbs, c. 1925...
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2 Early Electric Motors, c. 1895...
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Eletromagnetic Motor with Geissler Tube, c. 1...
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Electric Motor Teaching and Experimental Set,...
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3 Interesting Electric Motors, c. 1920...
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3 Small Electric Motors, c. 1920...
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3 Interesting Toy Electric Motors...
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Needle Galvanometer by Siemens & Halske, c. 1...
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2 Power Generators...
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2 Early Electric Motors...
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Electric Motor and 2 Armature Models, c. 1910...
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29 Early Carbon Filament Bulbs, 1900 onwards...
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Large Current-Generating Dynamo, c. 1910...
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Group of Measuring and Surveying Instruments...
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Brass Standard Meter, c. 1890...
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Otto Fennel Standard Meter, c. 1930...
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Surveying Compass, c. 1850...
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Stanley Brass Surveyor's Level, c. 1910...
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Coincidence Rangefinder Wild TM2, 1966...
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Leitz Brass Microscope, 1898...
