Public domain
North American Aviation, Incorporated. Inglewood, California(?). A Wright whirlwind engine for a B-25 bomber receiving a final checkup before moving to the final assembly floor
From the collection of Library of Congress. Free to download, adapt and use — no permission needed.
Credit lineNorth American Aviation, Incorporated. Inglewood, California(?). A Wright whirlwind engine for a B-25 bomber receiving a final checkup before moving to the final assembly floor. 1942-01-01. Lownds, Mead Maddick. Farm Security Administration/Office of War Information Collection, Library of Congress. Public domain.
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