Public domain
A skilled machinist on a turret lathe in North America's machine shop tests the accuracy of his work with a micrometer
From the collection of Library of Congress. Free to download, adapt and use — no permission needed.
Credit lineA skilled machinist on a turret lathe in North America's machine shop tests the accuracy of his work with a micrometer. 1942-01-01. Palmer, Alfred T.. Farm Security Administration/Office of War Information Collection, Library of Congress. Public domain.