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.
   
 
  - Exterior
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            | 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 |  
 
 
  - Functions
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            | Water resistance : | 10 bar |  
            | Magnetic resistance : | Equipped |  
            | Weight : | 187.0 g |  
            | 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 |  
 
 
This product was added to our catalog on Wednesday 27 May, 2020.