The Citizen Promaster Marine Super Titanium NY0100 - 50X is a must - have for diving enthusiasts. Whether you're exploring the shallow reefs or diving deep into the ocean, this watch will be your reliable companion. It's also great for water sports lovers. With a case diameter of 42mm and weighing just 110g, it's lightweight and comfortable to wear. The 200m water resistance ensures it can handle the pressure of deep dives. The automatic movement keeps accurate time with a 40 - hour power reserve, so you don't have to worry about winding it frequently.