Description
Sophisticated and graceful design
Before the Grand Seiko Style was established, the very first Grand Seiko watch was born in 1960. Its spirit lives on in the case design of this model, which blends classic elegance with modern refinement. The watch’s round form presents a gentle silhouette from every angle. Though seemingly simple, the lugs feature an intricate slope that widens toward the tip, accentuating the distortion-free mirror surface and delicate ridgelines created through Zaratsu polishing. The brilliant shine of the case, created by our craftspeople, adds a touch of tension to the classic aesthetic, resulting in a sophisticated and graceful design.
TECHNICAL DATA
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 39.5mm Lug-to-lug 46.9mm Thickness 14.1mm
Band width: 19mm
Band Material: Crocodile leather
Clasp type: Three-fold clasp with push button release
The perimeter of Band: 200mm
MOVEMENT
Caliber no.: 9S66 Instructions
Movement Type: Automatic with 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: 92 g
Other details or Features:
35 jewels
24-hour hand (dual time display function)
Calendar-linked time difference adjustment function






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