Close-up view of factory worker adjusting a lidded piece of machinery, ca.1950 

Interior view of unidentified factory, showing piles of fabric in the foreground, ca.1940 

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

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

Female workers in a textile mill, showing a single woman with her back to the camera in the foreground, ca.1930 

Factory worker in a kiln of a ceramics factory, ca.1935 

Man working in a small woodshop with machinery, ca.1930 

Two unidentified workers lowering chains in a factory, ca.1930 

Unidentified factory conveyor belts, showing workers at the left back, ca.1950 

Factory worker working with large machinery, ca.1950 

Interior of a factory with metal workers, ca.1930 

Two factory women workers examining cylindrical components, ca.1930 

Lines of women workers in an electronics factory, showing some working on large disks, ca.1950 

Exterior view of large unidentified factory, showing steam pipes in foreground, ca.1950 

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

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 

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