Interior of a metal factory, ca.1930 

Interior of an unidentified factory where a worker is "machining heat exchanger bodies", ca.1930 

Several men inside the interior of an unidentified factory, ca.1930 

Interior view of an unidentified factory, showing three men at a large engine, ca.1940 

Interior view of an unidentified factory, perhaps a war (?) industry plant, ca.1942 

Several men at the National Supply Company factory interior, ca.1930 

Interior of an unidentified factory, showing two factory workers gripping a large piece of equipment, ca.1935 

Interior view of an unidentified factory,showing workers from behind, ca.1940 

Interior view of an unidentified factory, with a close-up of male worker, ca.1940 

Unidentified factory interior, ca.1950 

Man in an unidentified factory interior, ca.1940 

Interior of a factory with metal workers, ca.1930 

Interior view of unidentified factory, showing a single worker standing near the turbines, ca.1935 

Interior view of a factory, showing large hydraulic press at center, May 1937 

Close-up of a man chiseling something inside an unidentified factory, ca.1940 

Atomic International factory interior with workers, ca.1950 

Three workers inside a factory, surrounded by large sacks, ca.1930 

Men standing near tables in the interior of an unidentified factory, ca.1920 

Unidentified factory interior, ca.1940 

Unidentified factory interior, showing workers adjusting a small slab beneath a large machine, ca.1930