Celebrating twenty-five fruitful years of Caliber 9S mechanical watchmaking, Grand Seiko presents the new Hi-Beat GMT 25th Anniversary Limited Edition ref. SBGM253, whose delicate blue sunray dial takes inspiration from the view from the top of Mt. Iwate, looking out towards a horizon of blue sky. A classic 39.5mm stainless steel form prevails thanks to this creation’s mirror-finished bezel and case, gently curved lugs with a distortion-free mirror finish achieved through Zaratsu polishing, and a box-shaped sapphire crystal. 

The timeless design features a classic profile, yet a see-through case back provides a view of the thoroughly modern 9S66 GMT movement, which has been outfitted with a titanium oscillating weight in Grand Seiko blue colored by the same anodic oxidation treatment. As with all Grand Seiko GMT watches, its ease of use is ensured through the local hour hand, which is independently adjustable so that precision is maintained even when adjusting the time according to one’s travels. And as with the Sport Collection’s limited-edition watch, the tempered blue GMT hand can be aligned to any time zone of one’s choice. The blue 24-hour scale printed on the pale blue sunray dial displays the second time zone, ensuring that subtlety and legibility distinguish this anniversary edition’s design in equal measure.

Specifications

Exterior

• Case Material : Stainless steel
• Glass Material : Box-shaped sapphire
• Glass Coating : Anti-reflective coating on inner surface
• Case size : Diameter 39.5mm × Thickness 13.7mm
• Bracelet: Stainless steel
  
• Clasp type : Tri-fold clasp with push button release

Movement

• Caliber no. : 9S66 Instructions
• Movement Type : Automatic
• Power reserve : Approx. 72 hours
• Accuracy : +5 to -3 seconds per day (when static)

Functions

• Water resistance : 3 bar
• Magnetic resistance : Equipped
• Other details / Features :
• 24-hour hand (dual time display function)
• 37 jewels
• Calendar-linked time difference adjustment function
• Exhibition caseback with custom blued rotor
• Date display
• Stop seconds hand function
• Limited Edition: 1,700 pieces