Public domain
Shopton, near Fort Madison, Iowa. Train control mechanism installed on a truck wheel of an engine in the Atchison, Topeka and Santa Fe Railway roundhouse
From the collection of Library of Congress. Free to download, adapt and use — no permission needed.
Credit lineShopton, near Fort Madison, Iowa. Train control mechanism installed on a truck wheel of an engine in the Atchison, Topeka and Santa Fe Railway roundhouse. 1943-01-01. Delano, Jack. Farm Security Administration/Office of War Information Collection, Library of Congress. Public domain.