A chronograph with the reliability of Spring Drive
The first ever Grand Seiko chronograph, this model is powered by a Grand Seiko’s unique Spring Drive caliber, which combines the motive force of a mainspring with the high precision of a quartz watch.
The Spring Drive mechanism allows the watch to maintain precise timekeeping while also incorporating accurate chronograph capabilities, all with a maximum 72-hour (3-day) power reserve.
Grand Seiko's original glide motion is also featured in the chronograph's blue steel second hand.
The chronograph utilizes a Ready/Start button with a half-press shutter, to ensure the most precise possible operation, the chronograph start an stop buttons have a ‘ready’ stage so that the chronograph is armed by pressing the button half way.
Case : Stainless steel
Case back: Stainless steel and sapphire crystal
Glass : High definition dual-curved sapphire crystal Coating : Anti-reflection coating on inner surface Lumi Brite : - Case size : Diameter 43.5mm×Thickness 16.1mm The perimeter of bracelet : 201.0mm Band : Stainless steel
Movement : Caliber 9R86 Driving system : Spring Drive Power reserve : Approximately 72 hours Accuracy : ±1 per day (±15 seconds per month)
Clasp : Three-fold clasp with push button release Water resistance : 10 bar Magnetic resistance : 4800 A/m (60 gauss) Weight : 187.0 g Remarks : Screw down crown
Dual time function with 24-hour display
Power reserve display function
Quick correction function of time difference adjusting to a calender
The movement at the heart of Grand Seiko
Combining cutting-edge technology and time-tested craftsmanship as one of the world's true watch manufactures
Capturing and refining the very essence of a watch
A legacy of innovation beginning with the first Grand Seiko in 1960