The new Grand Seiko automatic caliber 9S27 strikes that difficult and delicate balance between high performance and slimness that only a true “manufacture” can achieve. Its performance is outstanding, with a precision rate of +8 to -3 seconds a day and a power reserve of 50 hours. Each movement is made, assembled and adjusted by hand in the Shizukuishi Watch Studio in northern Japan and is made possible by the same high level of “manufacture” craftsmanship as goes into every other Grand Seiko mechanical watch.
The 18k white gold case is Zaratsu polished to give the timepiece the sparkle of quality that is the Grand Seiko signature. 42 diamonds are set into the bezel and 12 into each delicately engraved mother-of-pearl dial. One more and larger diamond is set into the crown.
Exterior
Exterior: 18k white gold
Case back: See-through & Screw case back
Glass Material: Dual-curved sapphire crystal
Glass Coating: Anti-reflective coating on inner surface
Case size: Diameter 28.7mm
Lug-to-lug 35.1mm
Thickness 10.9mm
Band width: 14mm
Band Material: Crocodile leather
Clasp type: Three-fold clasp
Movement
Caliber no.: 9S27 Instructions
Movement Type: Automatic with manual winding
Power reserve: Approx. 50 hours
Mean daily rate: +8 to -3 seconds per day
Functions
Water resistance: 10 bar
Magnetic resistance: 4,800 A/m
Other details / Features: