The Seiko Prospex automatic turtle diver's watch is equally desirable for both diving and every day wear. The hard coated Stainless Steel case is 45mm with a 120-click undirectional rotating bezel featuring a black aluminum insert and shielded lume pip. The SRP777K1 includes LumiBrite hour markers and hands, with a very fine metallic border that contrasts well on the matte black dial for easy reading in low-light conditions. Powered by a Japanese 4R36 Automatic movement with manual wind ability, this timepiece has an impressive power reserve of approximately 40 hours. The SRP777K1 also has a day/date function at 3 o'clock through a beveled window. With the Prospex range being built to sustain harsh conditions, the screw down stainless steel case back gives the watch a water resistance up to 200m with Seiko's hardened mineral glass offering excellent legibility. Set upon a black silicone strap and fastened with a classic buckle it gives a soft and flexible fit. SRP777K1 comes complete with a two year guarantee.