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Grand Seiko Elegance Mechanical GMT SBGM257G

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Grand Seiko Elegance Mechanical GMT SBGM257G

In autumn, when the moon’s light fills the sky with its soft glow, drops of dew gleam in the light in a moment that captures the beauty of the season. The SBGM257 “Moondrop” expresses such a special moment with its textured blue dial. Thanks to its modern geometric spiral pattern, the dial changes in appearance based on the angle of the light, recalling how dew drops gleam in the moonlight. The intricate pattern imparts a refined sense of structure, a fitting complement to the Zaratsu-polished case and the high precision of the Caliber 9S66 GMT movement. Prized for its accuracy, beauty, and reliability, this movement enables the wearer to track two time zones simultaneously. The gold-colored GMT hand can be set to one’s home time or any time zone of one’s choosing. The local hour can be changed in one-hour increments when the crown is extended to the first click position, making time zone adjustments simple and intuitive. The power reserve is approximately three days.

Exterior
Exterior: Stainless steel
Case back: Screw case back
Glass Material: Box shaped sapphire crystal
Glass Coating: Anti-reflective coating on inner surface
LumiBrite: Lumibrite on hands and index(es)
Case size: Diameter 39.5mm Lug-to-lug 46.9mm Thickness 14.1mm
Band width: 19mm
Clasp type: Three-fold clasp with push button release
The perimeter of Band: 200mm
Movement
Caliber no.: 9S66 
Movement Type: Automatic with manual winding
Power reserve: Approx. 72 hours(3 days)
Mean daily rate: +5 to -3 seconds per day
Functions
Water resistance: Splash Resistant
Magnetic resistance: 4,800 A/m
Other details / Features:
  • Screw-down crown
  • 35 jewels
  • 24-hour hand (dual time display function)
  • Calendar-linked time difference adjustment function