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, reducing mistakes and allowing for accurate starts. The button has been designed with comfort of use in mind and produces a satisfying click with just the right resistance.
|Case Material :||Stainless steel|
|Glass Material :||Dual-curved sapphire|
|Glass Coating :||Anti-reflective coating on inner surface|
|Case size :||Diameter 43.5mm × Thickness 16.1mm|
|The perimeter of Band :||201mm|
|Clasp type :||Three-fold clasp with push button release|
|Caliber no. :||9R86 Instructions|
|Movement Type :||Spring Drive|
|Power reserve :||Approx. 72 hours(3 days)|
|Accuracy :||±1 second per day / ±15 seconds per month (average)|
|Water resistance :||10 bar|
|Magnetic resistance :||Equipped|
|Weight :||187.0 g|
|Other details / Features :|| |