CONFIRMEDDate confidence: CONFIRMEDStated as firmHow firmly the source words the date: confirmed, scheduled, estimated, delayed or unverified.Show all CONFIRMED pins87% CONFIDENCEOverall confidence: 87%How well the pin's source and references back up its dates.Weighted average of how firmly 3 references, the source included, support the pin's start and end times; a reference counts half as much for every 180 days older than the newestShow all pins at 75% confidence or better
Confirmed per History.com[3]'s "Ford's[2] assembly line starts rolling" entry, which dates the first complete-automobile moving assembly line to December 1, 1913 at Ford's Highland Park plant.On December 1, 1913, Ford Motor Company extended its moving line at the Highland Park plant to assemble a complete Model T chassis start to finish, cutting build time from over 12 hours to about 93 minutes.
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