A high-beat mechanical watch with a dial that expresses the vitality of white birch forests.

Features
This model’s case embodies the Evolution 9 Style, a development of Grand Seiko’s design language known as the Grand Seiko Style. With its intricate pattern and silvery white hue, the watch’s dial dynamically expresses the white birch forests that grow in profusion near the Grand Seiko Studio Shizukuishi, the manufacturing base for Grand Seiko’s mechanical watches. Inside is the mechanical high-beat Caliber 9SA5, a Grand Seiko-exclusive automatic movement. Thanks to its innovative Dual Impulse Escapement and twin barrels, it achieves a high frequency of 36,000 vibrations per hour while offering an impressive power reserve of approximately 80 hours when fully wound.

Exterior
Exterior: Stainless steel
Case back: See-through & Screw case back
Glass Material: Box shaped sapphire crystal
Glass Coating: Anti-reflective coating on inner surface
Case size: Diameter 40.0mm Lug-to-lug 47.0mm Thickness 11.7mm
Band width: 22mm
Clasp type: Folding clasp with push button release
The perimeter of Band: 190mm

Movement
Caliber no.: 9SA5 Instructions
Movement Type: Automatic with manual winding
Power reserve: Approx. 80 hours
Mean daily rate: +5 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: +8 to -1 seconds per day

Functions
Water resistance: 10 bar
Magnetic resistance: 4,800 A/m
Weight: 178 g
Other details / Features:
Screw-down crown