Check out this 1957 Sportster Time-Lapse rebuild video on YouTube by Hagerty.
They took over 20,000 photos over 3 months. This is for part 1. Part 2 to be released at a later date. Sounds like they may release a rebuild video by the end of the year.
https://www.youtube.com/watch?v=ft3GUzuo_AM
It looks like the Vin # is 57XL1298
Thanks,
Gary