A Tissot mechanical movement contains an average of 100 finely manufactured parts. The balance wheel lies at the heart of the movement and ensures its accuracy. With its constant backwards and forwards movement, the balance and the balance spring divides the time into equal portions, thereby accurately regulating the movement of time. The movements of the balance spring, called oscillations, are what causes your watch to “tick”. The balance wheel’s total oscillations equate to 385,000 turns a day.