Instructions for Use 1963 International Edition The International Edition of the 1963 watch has been iteratively upgradedfrom the original 1963 model. While the movement and othercore specifications remain unchanged, we have significantly reduced theprice. Additionally, the case back has been upgraded to atransparent design. The video showcases the product in use.The video guides you through product setup.The video compares multiple products.The video shows the product being unpacked. Movement Seagull ST1901 Drive mode Manual winding Dial diameter 37.4mm Mirror material Coated glass Watch strap width 18mm Waterproof 30m Watch buckle Needle buckle Watch strap material Canvas Band circumference 28cm Number of jewels 22 Case Thickness 15mm Feature Chronograph Origin Mainland China Item Type Mechanical Wristwatches The video showcases the product in use.The video guides you through product setup.The video compares multiple products.The video shows the product being unpacked. SEA-GULL Watch Since 1955 The "Seagull" brand watch has a history of more than 60 years since its birth in 1955. Were rated as "China Famous Brand" products by the state.1973-The first international export of Chinese watch brands.1981-1990, Seagull has undergone many technical transformations.The ST11 movement watch is designed on the basis of ST6.Gold Medal at Poznań International Watch Fair.At the same time, A quarter of the movements in the world are from the Seagull watch factory. How do I wind it manually? The manual winding method for this watch is: do not pull out the crown, turn the crown directly clockwise. How to check the accuracy of a mechanical watch？ Please wind the watch fully, re-calibrate the time, and then leave the watch to observe for 24 hours to see if its timekeeping error is between 20 seconds slow and 40 seconds fast. How to do if there is water inside the watch? If there is only a small amount of water vapour, wear the watch backwards on your wrist and it will disappear after a while. If there are some water drops inside the watch, you should have the watch repaired as soon as possible. What do I need to pay special attention to? 1963 watches are hand-wound mechanical watches that need to be fully wound to ensure accurate timekeeping. Are you the official flagship shop of Seagull? We are official flagship store of Seagull Watch, the only designated officialauthentic flagship store opened on Amazon by Sea-Gull Official Store. The products we sell are guaranteed to beauthentic and provide complete after-sales service.