On October 7, 1913, the moving assembly line was born at the factory of the
Henry Ford's invention allowed workers to build a Model T from scratch in 84 steps, cutting the production time from 12 hours to around 90 minutes.
A year after the birth of the assembly line, Ford doubled wages for workers, allowing them to buy the cars they built (he supported high wages for moral as well as economic reasons).
To celebrate the date, Ford released these photos of the Highland Park assembly line in 1913. You can see that in the beginning, cars in production were towed along the line by rope:
Ford Motor Company
Ford Motor Company
Ford Motor Company
And here's some early footage: