Two men working at a machine inside an unidentified factory, ca.1942 

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

Unidentified factory interior, ca.1950 

Unidentified employees at a factory, ca.1950 

Men working inside the Harvey Aluminum factory, ca.1940 

Workers manipulating sheet metal inside a factory, ca.1950 

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

Interior view of an unidentified factory, with two suited men inspecting metal parts, while workers are on an assembly line in background, ca.1942 

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

Two male workers inside a factory, ca.1930 

Man in an unidentified factory interior, ca.1940 

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

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

Unidentified factory workers inspecting a mechanical part, ca.1950 

Unidentified factory interior with a woman posing next to a "Super Frigidaire Power..." piece, ca.1950 

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

Unidentified factory interior, ca.1940 

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

Unidentified factory exterior, showing roof and smokestacks, ca.1940 

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