Heritage

Specifications

About this reference

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: Folding clasp. Movement: Caliber no.: 9S27 Instructions; Movement Type: Self-winding with manual-winding; Power reserve: Approx. 50 hours; Mean daily rate: +8 to -3 seconds per day Mean daily rate is a mean value of daily rates in a condition where the movement before assembly in a case is measured in six positions in a fixed manner under artificially controlled environment for 12 days.; Normal usage accuracy: +10 to -5 seconds per day. Functions: Water resistance: 10 bar; Magnetic resistance: 4,800 A/m; Other details / Features: Case with diamond(s) Mother of pearl dial with diamond(s) 35 jewels.