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|Glass Material:||Box shape sapphire glass|
|Glass Coating:||Anti-reflective coating on inner surface|
|Case size:||Diameter 40,2 mm × Thickness 12,8 mm|
|Clasp type:||Triple lock with push-button release|
|Power reserve:||Approx. 72 hours (3 days)|
|Accuracy:||± 1 second per day / ± 15 seconds per month (average)|
|Water resistance:||10 BAR / 100 M / 330 FT|
|Other details / Features:||Crocodile leather strap, Magnetic resistance, 30 jewels, Date display, Power reserve display, Stop second hand function, Transparent back case with 6 screws and lion logo.|
Classically designed Spring Drive watch
This simply finished model without crown guard is powered by Grand Seiko's unique Spring Drive calibre, which combines the drive power of a main spring with the high precision of a quartz watch. In Spring Drive, the second hand moves in perfect gliding motion, reflecting the natural and continuous flow of time itself. It has a power reserve of 72 hours and a power reserve indicator at the bottom left of the dial.
The dial and its versatile hands and hour markers appear to change depending on the angle and amount of light, giving this watch an eternal appeal. Carriers of this watch can enjoy a clear view of the movement through the clear back of the case.
The classic style consists of box-shaped sapphire crystal, different color of the dial, power reserve indicator, crocodile strap and so on.
"Automatic Spring drive 3-day"
Our company unveiled Spring Drive in 1999, but the lack of a sufficiently effective automatic winding mechanism and a power reserve of 72 hours prevents its acceptance in the Grand Seiko line. After another four years of development, the first Grand Seiko 9R Spring Drive was made.
The winding system and driving time were improved from the existing 48-hour manual winding system to an automatic 72-hour power reserve. The automatic winding mechanism uses Seiko's original Magic Lever mechanism, developed in 1959, but with improved productivity, maintainability and durability to improve winding efficiency.
Calibre 9R65 is currently the most standard of the 9R Spring Drive movements and is used in many Grand Seiko models.