Public domain
Chicago, Illinois. Telegraph switch board of the Pennsylvania railroad in the Pennsylvania telegraph room at the Union Station
From the collection of Library of Congress. Free to download, adapt and use — no permission needed.
Credit lineChicago, Illinois. Telegraph switch board of the Pennsylvania railroad in the Pennsylvania telegraph room at the Union Station. 1943-01-01. Delano, Jack. Farm Security Administration/Office of War Information Collection, Library of Congress. Public domain.
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