Interior view of an automobile factory showing a worker on an assembly line, ca.1925 

Interior view of a Los Angeles automobile factory showing workers on an assembly line, ca.1925 

Interior view of an unidentified automobile company showing workers on the assembly line, ca.1925 

Interior of an automobile factory with assembly line, ca.1939 

Workers assembling dashboards for automobiles in an unidentified factory, [s.d.] 

Interior view of assembly line at the Chrysler factory in Commerce, CA, 1952-1953 

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

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

An unidentified aircraft assembly manufacturing factory assembly line, showing F-80 airplanes, ca.1945-1950 

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

Exterior view of what appears to be a truck repair garage, ca.1925 

Interior view of an unidentified food factory, ca.1930 

Workers in an unidentified food factory, ca.1930 

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

Women workers on assembly line at the International Telemeter Corporation, ca.1940 

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

Plant interior showing workers assembling transformers, ca.1930 

Factory worker spooling rubber on a conveyor belt, ca.1945 

Interior of the Madsen Iron Works factory, ca.1925 

Three factory workers inspecting tires, ca.1950