How a watch works - film from Hamilton in 1949

This is very cool. Archive.org has public-domain film from the legendary Hamilton company, an introductory film on "How a Watch Works." Black and white, download or streamable.

Very cool.

http://www.archive.org/details/HowaWatc1949

Also on the same site, another Hamilton film on 'What makes a fine watch fine' - http://www.archive.org/details/WhatMake1947