A complete service of the movement involves different steps, such as disassembly, inspection, cleaning and the replacement of the jewels or any component showing the slightest sign of wear and tear. The service also includes the polishing of the case, as well as the replacement of the crystal, where necessary. The movement is reassembled, adjusted and lubricated and the timepiece is then subjected to a battery of tests in compliance with Manufacture standards. Your watch is a high-precision instrument, regular maintenance of which is essential. Even though this process may require several weeks, it remains one of the principal guarantees of its longevity. In accordance with professional guidelines, you are advised to have your watch cleaned and inspected at least once every three years, to ensure that it runs effectively. Should you begin to set the watch at widely varying times, a service of the movement may prove necessary.