Grand Seiko Heritage GMT 40mm
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Discover the SBGJ265G from Grand Seiko
The Grand Seiko SBGJ265 is a modern tribute to the iconic 44GS, which in 1967 defined the “Grand Seiko Style” with its brilliant, sharply contoured design. This reinterpretation features flat, mirror-like surfaces crafted from Ever-Brilliant Steel—a high-performance alloy with superior corrosion resistance that ensures long-lasting beauty. The dial showcases the textured “Mt. Iwate pattern,” inspired by the majestic peak visible from the Grand Seiko Studio Shizukuishi. Inside, the Hi-Beat Caliber 9S86 delivers exceptional precision and incorporates a GMT function, allowing the wearer to track time in two zones simultaneously with ease and accuracy.
Grand Seiko Watch Warranty
The period of the Grand Seiko worldwide warranty is five years from the date of purchase.
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Shipping & Returns
Free FEDEX overnight shipping on all Grand Seiko watches. Our return policy is 10 days for your money back, or 30 days to exchange.
Technical information about this watch
Grand Seiko Heritage GMT 40mm

100M / 10 ATM water resistance
Water resistance indicates a watch's ability to withstand moisture and water. Ratings are measured in metres (M) or atmospheres (ATM). For instance, 30M (3 ATM) is suitable for light splashes, while 100M (10 ATM) and above are ideal for swimming and diving. Regular maintenance helps retain water resistance over time.

Calibre 9S86 Automatic movement
Caliber 9S86 builds on the core performance of Caliber 9S85, offering the same high accuracy of +5 to –3 seconds per day and a 55-hour power reserve, while adding a GMT function ideal for international travelers. The GMT hand displays home time, and the local hour hand can be adjusted independently—without stopping the seconds hand—ensuring continuous precision. This high-beat movement embodies Grand Seiko’s commitment to exceptional accuracy, whether tracking local time or a second time zone.

40mm case size
Case size, measured in millimetres (mm), impacts the watch's look and fit. Men's watches typically range from 38mm to 46mm, and women's from 26mm to 36mm. Larger cases make a bold statement, while smaller cases offer a classic look. Choosing the right size ensures comfort and style.

55 hours power reserve
Power reserve is the duration a watch runs on a full wind or charge. Mechanical watches usually offer 40 to 80 hours, with some extending to several days. Quartz watches, powered by batteries, last several years. Knowing the power reserve helps maintain accurate timekeeping.
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