So with a hobby which includes collecting and repairing clocks and watches an interest in the science of Horology is a logical parallel. The idea that a bunch of gears and a spring or wieght can keep time to within seconds a week is just amazing to me and some fine clock mechanisms can do better than that. The escapment is the key and the math that goes into its design and function is quite a subject to delve into.
Graham DeadBeat Escapement Design
Graham DeadBeat Escapement in Motion