Water can be a threat to your watch. If in fact even a few drops got into the case, the mechanism would be affected and could rust. For this it is important to check the seal regularly and pay attention to the characteristics, because not all watches are waterproof. The impermeability test requires only a few minutes and is performed with specific machinery that makes it possible to test the seal of the case at different pressures depending on the type of watch. It is advisable to have the watch tested at least once a year, preferably before the summer. At Gobbi the test is completely free.