1884? Koken Congress one lever

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I have no clue what I have found or what its worth. I have found one chair on the net exactly like mine and it said that this chair has been known to bring 50,000 and more at auction. Is this true? Please help on the value.

www.flickr.com/photos/36997106@N03/3767237120/
www.flickr.com/photos/36997106@N03/3766431063/
www.flickr.com/photos/36997106@N03/3767215574/

thanks
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