This 10-beat, manual-winding mechanical watch is based on the “Evolution 9 Style,” a unique design grammar that takes the fusion of Grand Seiko’s spirit with the aesthetic sensibilities of Japan to a higher level. Its textured, navy-colored dial evokes the bark of a white birch tree illuminated by the moon. Featuring a slender stainless steel case that is a mere 9.95mm thick, the creation has an appearance worthy of a Grand Seiko dress watch. The bezel is refined, with a narrow profile that complements the lugs, whose clean lines are echoed on the dial by the indexes. The manual-winding movement is the Caliber 9SA4, which features a high number of vibrations, 10 per second, to maintain a stable level of accuracy, as well as a generous power reserve of up to 80 hours.
Specifications
Exterior
Exterior: Stainless steel, Caseback: Stainless steel and sapphire crystal
Case back: See-through case back
Case back with 4 screws
Glass Material: Box shaped sapphire crystal
Glass Coating: Anti-reflective coating on inner surface
Case size: Diameter 38.6mm Lug-to-lug 45.0mm Thickness 9.95mm
Band width: 20mm
Band Material: Cow leather
Clasp type: Three-fold clasp with push button release
The perimeter of Band: 195mm
Movement
Caliber no.: 9SA4 Instructions
Movement Type: 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: Splash Resistant
Magnetic resistance: 4,800 A/m
Weight: 74 g
Other details / Features:
Power reserve indicator
