Boshū. When the beauty of autumn is at its height.
The dial of this dress watch is in a deep burgundy color that is inspired by the rich autumn colors of Boshū, the ‘sekki’ or season when the trees that surround the Grand Seiko Studio Shizukuishi in northern Japan change in hue and announce that winter is just around the corner.
Powered by the slim, hand-wound movement, Caliber 9S64, this refined timepiece is simple in its overall design but so exquisitely finished that its details are forever fascinating. The dial is open and clean but, when viewed through the sapphire case back, the intricate perfection of the hand-assembled and adjusted movement is abundantly and satisfyingly clear. Thanks to a long mainspring and a balance, both made of proprietary SPRON alloys, this watch has a high and stable accuracy rate and a power reserve of 72 hours.
Specifications
Exterior
Exterior: Stainless steel
Case back: See-through case back
Case back with 6 screws
Glass Material: Box shaped sapphire crystal
Glass Coating: Anti-reflective coating on inner surface
Case size: Diameter 37.3mm Lug-to-lug 44.3mm Thickness 11.7mm
Band width: 19mm
Band Material: Crocodile leather
The perimeter of Band: 195mm
Movement
Caliber no.: 9S64 Instructions
Movement Type: Manual winding
Power reserve: Approx. 72 hours(3 days)
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: +10 to -1 seconds per day
Functions
Water resistance: Splash Resistant
Magnetic resistance: 4,800 A/m
Weight: 61 g
Other details / Features:
24 jewels
