Using your Seiko Presage Sharp - Edged Series GMT Special Edition watch is easy. You can set the time by pulling out the crown and turning it. For the GMT function, it helps you keep track of a second time zone. If you want to add some extra power, you can manually wind the watch by turning the crown clock - wise. When it comes to taking care of your watch, avoid hitting it against hard objects as it may damage the case or the movement. Keep it away from magnetic fields, as they can affect the accuracy of the watch. To clean the watch, use a soft, dry cloth. If the watch gets wet, dry it thoroughly. Have the watch serviced by a professional every few years to ensure it runs smoothly.