This sports watch has all the features you expect. It works reliably on land. It works in water. It works underwater. Impressive water-resistance up to a pressure of 30 bar (300m/1000 ft) is combined with the energy of a Swiss Made quartz movement. With a screw-down crown and case back, the Seastar 1000 Quartz GMT is ready for water. Super-LumiNova® helps you read it in the dark. It is an aquatic ace that truly has it all. The screw-down crown also offers additional protection against knocks.