Many watches have a specification for water resistance, which can vary greatly depending on the model. As a rule, a distinction is made here between 3, 5, 10 and 20 bar pressure, which the watch cases must withstand. These specifications are often somewhat misleading and therefore require a more precise explanation. The metre specification only corresponds to an artificial pressure generated in a water tube. In reality, however, this pressure can change depending on the current and body movement and is usually higher. If watches have a water resistance up to 3 bar (3 ATM or 30 metres), they are only splash-proof. This means they should also be taken off for showering. At 5 bar (5 ATM or 50 metres), you can safely wash your hands with the watch. However, it should also be taken off for showering or swimming. From 10 bar (10 ATM or 100 metres), the watch can also be worn for showering and swimming. Watches with a water resistance of 20 bar (20 ATM or 200 metres) can then be left on for diving. However, you should still pay attention to the depth and the resulting pressure. Basically, the higher the bar rating, the more water resistant the watch. However, if the watch is used under water, care should be taken not to operate any pushers or the crown. This can affect the water resistance and cause damage to the watch.
