Story An ISO-grade dive watch with style to spare The Prospex Automatic Diver is marked by ISO-approved, dive-watch functionality and classic good looks. An iconic Seiko design, it’s been leveled-up with a specially-treated, anti-reflection sapphire crystal and a catchy, black ceramic bezel that brings out its 3D pressed-pattern dial. It’s powered by the Japanese maker’s proprietary, automatic caliber 4R36 movement, which boasts an impressive 41-hour power reserve that can be wound automatically or by-hand. LumiBrite hands and markers not only tell the time in low-light conditions, they also illuminate a clear-as-day view of the magnified calendar window. And last but not least, a secure screwdown crown and caseback step up its water-resistance to depths of 200 meters. Features Black ceramic rotating elapsed timing bezel Manual and automatic winding capabilities Khaki green dial with 3-D pressed pattern Magnified day and date window LumiBrite hands and markers for crystal clear visibility under low-light conditions Secure screwdown crown and caseback for water-resistance down to 200 meters Materials Case: Stainless steel Crystal: Sapphire crystal with anti-reflection coating on the inner surface Strap: Khaki green silicone strap Specs Diameter 45mm Thickness 13.22mm Length 47.7mm Movement Caliber 4R36 Vibrations Per Hour 21,600 Jewels 24 Power Reserve Approx. 41 hours Water Resistance 660 feet (200m), follows ISO standards for scuba diving Lug Width 22mm About Seiko When we think of Seiko, one word comes to mind: legacy. Founded in 1881 by entrepreneur Kintaro Hattor in the heart of Tokyo, Seiko knows every nook and cranny of what makes an elite watch truly incredible. In those 130+ years, they came up with lasting innovations like the first quartz watch, the first titanium dive watch, and the first multi-functional digital watch. Needless to say, Seiko continues to push the watch game forward.