I just did a quick Google search and found this: https://www.youtube.com/watch?v=Jz9nxzgtBaU https://www.youtube.com/watch?v=Jz9nxzgtBaU It's wound up like an

I just did a quick Google search and found this: https://www.youtube.com/watch?v=Jz9nxzgtBaU https://www.youtube.com/watch?v=Jz9nxzgtBaU It's wound up like any other old pendulum clock.