On This Day December 1st

December 1st 1913 Ford debuts assembly line
By 1913, the company had developed all of the basic techniques of the assembly line and mass production. Ford introduced the world's first moving assembly line that year, which reduced chassis assembly time from 12½ hours in October to 2 hours 40 minutes (and ultimately 93min), and boosted annual output to 202667 units that year (in 1914 it was 308162, 1915 was 501462; by 1920, production would exceed one million a year).
The efficiency and speed of Ford's production lines allowed the company to sell cars for less than any competitor.