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

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

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

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

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

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

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 the assembly line at the Ford Motor Company plant in Long Beach, ca.1936 

Interior of the Madsen Iron Works factory, ca.1925 

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

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

Factory interior showing a worker tending to an automotive tire, ca.1930 

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

Interior view of an unidentified food factory, ca.1930 

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

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

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

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

Workers in an olive factory, ca.1920 

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