Sport

Specifications

About this reference

With its screw-down crown, distinctive hands generously coated with Lumibrite, one-way rotating bezel and water resistant to a depth of 200 meters, this watch provides all the security and legibility that the diver requires. It also offers the precision and durability of Grand Seiko's diver high-beat movement, Caliber 9S85. Each hand is different, to ensure that the time can be read easily and without error that they stand out clearly from the dark blue dial. The triangular marker at twelve o’clock ensures that, even at depth, no mistake is made. Every component is built to last, but all divers know that their watch needs regular maintenance, just like every other device on which his or her life may depend. This is why the case, stem pipe and crown are designed for secure servicing and even the bezel has a four-part design that makes for easy disassembly and re-assembly at the Grand Seiko Service Centers. Exterior: Exterior: Stainless steel; Case back: Screw case back; Glass Material: Sapphire crystal; Glass Coating: Anti-reflective coating on inner surface; LumiBrite: LumiBrite on hands, index(es) and bezel; Case size: Diameter 43.8mm Lug-to-lug 51.0mm Thickness 14.7mm; Band width: 22mm; Clasp type: Extension clasp with folding lock; The perimeter of Band: 190mm. Movement: Caliber no.: 9S85 Instructions; Movement Type: Self-winding with manual-winding; Power reserve: Approx. 55 hours; Mean daily rate: +5 to -3 seconds per day Mean daily rate is a mean value of daily rates in a condition where the movement before assembly in a case is measured in six positions in a fixed manner under artificially controlled environment for 12 days.; Normal usage accuracy: +8 to -1 seconds per day. Functions: Water resistance: 200m / 660ft diver's; Magnetic resistance: 4,800 A/m; Weight: 206 g; Other details / Features: Unidirectional rotating bezel Screw-down crown Three-fold clasp with secure lock 37 jewels.