Grand Seiko Automatic Mechanical GMT 3 Day SBGM257 Watch - Elegance

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.

With its textured spiral dial, the SBGM257 captures a moment when the seasons are especially felt in Shizukuishi, the place where Grand Seiko mechanical watches are made. The dial vividly recalls a time of year when moonlight is reflected by drops of dew in a delicate expression of autumnal beauty. A rich contrast results from the gold-colored GMT hand and the navy-blue textured dial.

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.

Exterior:

• Case Material: Stainless steel
• Case back: See-through 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: Folding 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

Features:

• Water resistance: Splash Resistant
• Magnetic resistance: 4,800 A/m
• 35 jewels
• 24-hour hand (dual time display function)
• Calendar-linked time difference adjustment function

Grand Seiko Style #: SBGM257