Public domain
Using a 2000 pound steam hammer on jar rein for drilling equipment. Keystone Drilling Company, Beaver Falls, Pennsylvania
From the collection of Library of Congress. Free to download, adapt and use — no permission needed.
Credit lineUsing a 2000 pound steam hammer on jar rein for drilling equipment. Keystone Drilling Company, Beaver Falls, Pennsylvania. 1941-01-01. Vachon, John. Farm Security Administration/Office of War Information Collection, Library of Congress. Public domain.