will's watch pages

How a watch works

The major components of a watch mechanism are:

1. Mainspring and motion work 
2. Wheel train 
3. Escapement 
4. Balance wheel 
5. Keyless work 

Video by Steven Williams 2008

For the most detailed and clear explanation of how a mechanical watch works, take a look at the 20 minute film made in 1949 by the Hamilton Watch Company and featuring the Hamilton 747 movement:
How A Watch Works