Using your Longines Primaluna watch is easy. Just look at the dial to read the time and date. There's no need to wind it every day because it has an automatic movement. When you move your wrist, the movement gets powered. For water resistance, it can handle splashes from rain or washing your hands, but don't wear it while swimming or diving. To keep your watch in top shape, wipe it with a soft, dry cloth regularly to remove dust and fingerprints. Avoid hitting it against hard objects as this could damage the case or the glass. If you notice any problems with the timekeeping or the movement, take it to an authorized Longines service center for a check - up.