Grand Seiko SBGM257

Men's Collection | Elegance Collection | Ladies Collection

Grand Seiko ‘Moondrop’ Contemporary Classics Mechanical GMT

£4,550

This item will be released 1 December 2025.
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This watch will be available in December

Description

The Grand Seiko ‘Moondrop’ Mechanical GMT takes inspiration from late Autumn nights, when sparkling dewdrops glimmer in the moonlight.

‘The Nature of Time’ theme features prominently in Grand Seiko watch designs – a Japanese spirituality where each moment is a unique expression unveiled through light and shadow. The watchmakers’ pride in their surroundings is represented from engineering watch movements, to creating dials reflecting the beauty of Japanese nature.

Joining the Grand Seiko Elegance collection, as a ‘Contemporary Classic,’ the box-sapphire crystal glass showcases a midnight blue geometric pressed dial pattern representing the scenery of Shizukuishi, where all Grand Seiko mechanical timepieces are crafted.
This timepiece features a gold-coloured steel GMT hand for tracking a second timezone, and is paired with a dark blue crocodile leather strap.

Through the exhibition caseback the in-house 9S66 mechanical movement can be seen, which is accurate to +5/-3 seconds per day with a 72-hour power reserve.

Every Grand Seiko features signature high standards of precision, durability and legibility, handcrafted in Japan by Takumi artisans.

Specifications

Movement
Calibre: 9S66
Movement Type: Automatic with Manual Winding
Power Reserve: 72 Hours
Mean Daily Rate: +5 to -3 seconds per day

*Prior to the assembly of the movement in a case, it undergoes testing in six different positions for 12 days in a controlled environment. The ‘mean daily rate’ is the average value of daily results from these tests.
Accuracy In Use: +10 to -1 seconds per day
Watch Exterior
Case Diameter: 39.5mm
Case Length: 46.9mm
Case Thickness: 14.1mm
Case Material: Stainless Steel
Case Back: Case back with 6 screws, See-through case back
Strap/Bracelet: Crocodile Leather
Lug Width: 19.0mm
Clasp: Three-fold clasp with push button release
Dial Colour: Navy
Other Specifications
Crystal Coating: Anti-reflective coating on inner surface
Crystal Type: Box shaped sapphire crystal
Water Resistance: Splash Resistant
Magnetic Resistance: 4,800 A/m
Weight: 92.0g
Other Specifications: 35 jewels, Calendar-linked time difference adjustment function, 24-hour hand (dual time display function)

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