Friday, April 1, 2016

Seiko - Grand Seiko Spring Drive Eight-day Power Reserve

This is the very first Grand Seiko watch to have been created by the celebrated Micro Artist Studio in Seiko’s facility in Shiojiri in the Nagano prefecture of central Japan. Known until now mainly for its Spring Drive Minute Repeater, Sonnerie and Eichi watches for Credor, the Micro Artist Studio is proud to contribute to the growing reputation of Grand Seiko and has developed a remarkable Spring Drive caliber that offers an eight-day power reserve with the Studio’s trademark quality of materials and finishing. Three barrels are integrated to extend the power reserve.
The movements are specially adjusted to deliver an even higher level of precision, ±10 seconds a month, and the Grand Seiko lion in 18K gold graces the oscillating weight to symbolize the enhanced accuracy. The green dial model also conveys a subtle symbol of the provenance of this new design. The fir tree motif on the dial was inspired by the Onbashira festival that is held every six years in Suwa, near the studio where the watch is made. The centerpiece of this festival is the carrying of huge fir trees down the mountainside to the shrine, where they are raised as symbols of the shrine’s renewal and its 1200 year old tradition.

On the back, a sapphire case back allows a clear view of the exquisite finishing of the one-piece bridge, the rubies and the power reserve indicator. This one-piece bridge ensures the precise positioning of each wheel in the gear train and maximizes the efficiency of the transmission of power from the barrels. Its rigidity also prevents distortion in the event of impact or other shock. The bridge traces the outline of Mt. Fuji and the highly polished rubies and tempered blue screws evoke the lights of the city of Suwa below the Studio’s home. The case is made of a special platinum that can be polished to a sparkling mirror finish using our Zaratsu technique, itself adapted for working with platinum.
The dial is remarkable. Like the diamond-dust sparkle of snow that shimmers in the morning light in the clear mountain air of the area around the Studio, the dial glistens with a subtle and unusual beauty. The five-faceted hour and minutes hands, one of the iconic characteristics of Grand Seiko, are longer than those on any previous Grand Seiko watches.

Technical details
Model: Spring Drive 8 Day Power Reserve: SBGD001

Caliber 9R01 Spring Drive
Driving system: Manual winding
Power reserve: 8 days (192 hours)
Accuracy: ±0.5 second per day (±10 seconds per month)
Power reserve indicator
Independent hour hand adjustment
Number of jewels: 56 jewels
Number of parts: 307
Outer diameter: 37.0mm, Thickness: 7.1mm

Case, dial and strap
Platinum 950 case
High definition dual-curved box shaped sapphire crystal with anti-reflective coating
Screw see-through case back
Water resistance: 10 bar
Magnetic resistance: 4,800 A/m
Diameter: 43.0mm, Thickness: 13.2mm
Crocodile strap with three-fold clasp with push button release

Retail Price
Approximate recommended retail price in Europe: 60,000 Euro

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