Using your Longines watch is easy. Just wear it on your wrist and use the clasp to secure it. The watch runs automatically, so you don't need to wind it manually. To read the time, look at the hands on the dial. The 24 - hour indicator at 9 o'clock helps you know if it's day or night. The half - moon central hand shows the date, and the moon - phase display at 6 o'clock is a fun extra. When it comes to care, keep it away from strong magnetic fields and extreme temperatures. If it gets dirty, use a soft, dry cloth to clean the case and strap. Avoid submerging it in water for long periods, even though it's water - resistant to 3 bar. If you have any problems or need servicing, take it to an authorized Longines service center.