What is the primary purpose of a watch movement?

The primary purpose of a watch movement is to keep time accurately. A watch movement, also known as the caliber, is the mechanism that powers the watch, driving the gears and hands to reflect the correct time. It can be mechanical, involving springs and gears, or quartz, which utilizes a battery and a quartz crystal to maintain a precise timekeeping function. This fundamental aspect of a watch is essential in all designs, regardless of style or additional features, as it dictates the watch's primary function of telling time.

While decorative appearance, strap adjustments, and impact resistance are important features in the overall design and functionality of a watch, they do not define the core purpose of the movement itself. The accuracy and reliability of such mechanisms are what enable a watch to serve its main role effectively.