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 Material : Stainless steel
Glass Material : Dual-curved sapphire crystal
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 :
・24-hour hand (dual time display function)
・Calendar-linked time difference adjustment function
・Chronograph with 30 minutes & 12 hours
・Power reserve display
・Screw case back
・See-through case back
・Stop second hand function