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 :
|Glass Material :
|Glass Coating :
||Anti-reflective coating on inner surface
|Case size :
||Diameter 43.5mm × Thickness 16.1mm
|The perimeter of Band :
|Clasp type :
||Three-fold clasp with push button release
|Water resistance :
|Magnetic resistance :
|Other details / Features :
- ・24-hour hand (dual time display function)
- ・50 jewels
- ・Calendar-linked time difference adjustment function
- ・Chronograph with 30 minutes & 12 hours
- ・Power reserve display
- ・Screw case back
- ・Screw-down crown
- ・See-through case back
- ・Stop second hand function