Carl Speyer (1845–1???) was a German socialist active in Germany, London and the United States.
He was a member of the board of the Arbeiter Zeitung and secretary of the Vereingte Tischler New Yorks, a German joiners union based in the city, as well as a founding member of the International Labor Union established in Paterson, New Jersey, in December 1878.John R. Commons et al. History of Labour in the United States: Nationalisation (1860–1877) Volume 2 of History of Labour in the United States p. 301
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