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Jon R. Roma: Gibson City "low voltage" model board
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Jon R. Roma: Gibson City manipulation chart
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Jon R. Roma: Tillie, Gibson City Tower's cat
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Jon R. Roma: Gibson City operator's desk
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Jon R. Roma: Gibson City model board
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Jon R. Roma: Gibson City levers
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Jon R. Roma: Gibson City low voltage control levers
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Jon R. Roma: Gibson City tower circa 1920