Another type of movement which is fun is the tuning fork movement: https://www.watchonista.com/articles/bulova-accutron-tuning-fork-revolution https://www.watch

Another type of movement which is fun is the tuning fork movement: https://www.watchonista.com/articles/bulova-accutron-tuning-fork-revolution https://www.watchonista.com/articles/bulova-accutron-tuning-... For those of you of a patriotic persuasion, its a US invention, something they did better than the swiss. I like them (even though I'm not american) because they are good looking movements, and have some hilariously tight engineering tolerances They also used to power planes and satellites before cheap low power robust quartz and eventually atomic clocks.