Grand Seiko Spring Drive Manual SBGY007

Most winter, the water of Lake Suwa freezes over and, most years, a long ridge appears in the ice from one side of the lake to the other. Tradition has it that this is the ‘Omiwatari’ or where the Gods walk out over the ice.
True or not, the legend has inspired the craftsmen and women at the nearby Shinshu Watch Studio to create a dial of exquisite subtlety for this hand-winding Spring Drive timepiece. It has the color, feel and texture of the snow-covered ice on Lake Suwa.
The movement is Spring Drive Caliber 9R31 which has the Dual Spring Barrel that delivers a power reserve of 72 hours when fully wound. Its exquisite finishing is visible through the exhibition case-back along with the power reserve indictor.

Reference Number - SBGY007

Exterior

Case Material - Stainless steel

Glass Material - Dual-curved sapphire crystal

Glass Coating - Anti-reflective coating on inner surface

Case Size - Diameter 38.5mm x Thickness 10.2mm

Band Material - Crocodile leather

Clasp type - Three-fold clasp with push button release

Movement

Caliber no. - 9R31

Power reserve - Approx. 72 hours (3 days)

Accuracy - +/-1 second per day / +/-15 seconds per month (average)

Functions

Water resistance - Splash Resistant

Magnetic resistance - Equipped

Weight - 68.0 g

Other details / Features - 30 jewels, Case back with lion emblem, Power reserve display, Screw case back, See-through case back, Stop seconds hand function