turning cylinder color changer (Q39061)

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Revision as of 09:56, 22 July 2025 by ChrisVG (talk | contribs) (‎Created claim: Property:P24: Rotating_footlight_color_changer.jpg)

first known color changer for electrical light

first known color changer for electrical light
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English
turning cylinder color changer
first known color changer for electrical light

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    First use date
    1882
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