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

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

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

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

Unidentified factory interior, ca.1950 

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

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

Water heaters (?) in an unidentified factory interior, ca.1950 

Man in an unidentified factory interior, ca.1940 

Close-up of a man working a machine inside an unidentified factory, ca.1935 

Interior view of the Ray Day Piston Factory in Seattle, Washington, 1930-1940 

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

Exterior of unidentified factory obscured in fog, ca.1940 

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

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

Exterior of unidentified factory, ca.1925 

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

Exterior aerial view of an unidentified factory, ca.1940 

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

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