Balance is an essential part of a mechanical watch for time regulation. It's a small, delicately designed wheel that oscillates by dividing time evenly so that the watch ticks regularly. Working with the balance spring, its purpose is to let it work uniformly and accurately. Consider it like the heartbeat of the watch. There is uniform pulsation that keeps everything else in rhythm.
Every oscillation or swing represents a beat, thus letting the watch measure with precision. A good balance is required to properly function a watch. Balances also highly influence accuracy and longevity.
