This is a re - interpretation of the 1968 Diver's GMT watch. It's a Save the Ocean limited edition with only 1,500 pieces available. Seiko Prospex is on a mission to safeguard the world's oceans for current and future generations. Through its 'Save the Ocean' initiative, it supports various marine conservation activities, and this new limited - edition nautical watch represents those efforts. It features an automatic movement with manual winding, caliber 6R54, and a power reserve of about 72 hours (3 days). The watch has a 24 - hour hand for dual - time display and a stop second - hand function. Its case is made of stainless steel with a bezel of stainless steel and ceramic. The case size is 42mm, and it has a sapphire crystal. The clasp is a three - fold type with a secure lock, push - button release, and extender. It's water - resistant up to 200m (660ft) for sailors. Style#: SPB439.


Using your Seiko Prospex Sea GMT Save the Ocean Limited Edition watch is a breeze. The 24 - hour hand helps you easily keep track of a second time zone. If you need to set the time, use the manual winding feature to start or adjust the movement. Remember, it has a power reserve of about 72 hours, so try to wind it regularly if you don't wear it often. When it comes to water resistance, it can handle up to 200m underwater, great for swimming or snorkeling, but don't take it for scuba diving without proper checks. For maintenance, keep it clean with a soft, dry cloth. Avoid exposing it to extreme temperatures or magnetic fields as these can affect its performance. And if you notice any issues, it's best to take it to an authorized Seiko service center.