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Locomotion
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Locomotion
National Railway Museum
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Image
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Non-Commercial Use
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Category
Telecommunications
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Maker
Edison, Thomas Alva
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Thomas Alva Edison
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On Display
Science Museum
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Information Age Gallery: Exchange
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Object type
telephone component
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Place
United States
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Material
copper (metal)
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metal (unknown), carbon
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Date
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Edison carbon button transmitter No. 32, 1878
1878
