Public domain
Production. Milling machines and machine castings. The outside of this machine-tool bed casting has been ground until the bare metal shines brightly. Now rough spots on the inside are being chipped away. Notice the reinforced rigging incorporated in the design of the casting itself -- much stronger
From the collection of Library of Congress. Free to download, adapt and use — no permission needed.
Credit lineProduction. Milling machines and machine castings. The outside of this machine-tool bed casting has been ground until the bare metal shines brightly. Now rough spots on the inside are being chipped aw. 1942-01-01. United States. Office Of War Information, Palmer, Alfred T.. Farm Security Administration/Office of War Information Collection, Library of Congress. Public domain.