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Production. Airplane propellers. Final assembly of blades into a two-way controllable Hamilton propeller for one of America's warships of the air. Leo Diana and George O'Meara are among the speedy, expert workers of the Hartford, Connecticut, plant, which is producing these propellers in great numbers

Production. Airplane propellers. Final assembly of blades into a two-w...

Picryl description: Public domain image of an industrial building, factory, workshop, workers, 19th-20th century, free to use, no copyright restrictions.