system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: Why are analog wrist watches so complex with so many individual components?
gpt
A mechanical wrist watch is using lots of tiny precision components and have only been around for about a hundred years. However it is not very complex. There is a spring as a power source, a very precise pendulum to keep time, an escapement that make sure the spring is unwound at the rate determined by the pendulum and then there is a series of gears to create the movement of the different dials. So it is not so complex but it does require some precision components that needs to fit inside a very tiny space.