A good starting point is to try to build a pin-pallet escapement design, like Timex used in the 60s and 70s. This is largely doable at home with a 3D printer an

A good starting point is to try to build a pin-pallet escapement design, like Timex used in the 60s and 70s. This is largely doable at home with a 3D printer and basic tools, e.g.: https://incoherency.co.uk/blog/stories/the-watch-project.html https://incoherency.co.uk/blog/stories/the-watch-project.htm... Getting to modern accuracy is hard though.