Alex Hamilton’s fourth lesson focuses on the motion works, the gear system responsible for the 12-to-1 ratio between the hour and minute hands. The tutorial details the installation and function of the cannon pinion, minute wheel, and hour wheel, explaining how they interact with the keyless works for time setting. A critical technical highlight is the friction fit of the cannon pinion, which allows the hands to be adjusted without stopping the underlying movement. This session provides a clear technical foundation for understanding how a watch translates mechanical power into a readable display.
