Watches, like any other moving object, Experience Frictional Drag
When you move your watch around, it experiences a measurable amount of friction between the watch's moving parts and the surrounding environment. This is especially noticeable when you are wearing the watch and doing something physical, like swinging your arm. This friction can cause tiny errors in the timekeeping functions of your watch.
The Earth's rotation also affects watches The Earth's Revolution around its axis causes an error in watches that use jumping gears to calculate time.