Grand Seiko

Spring Drive GMT Green

Reference Number SBGE257
Verified Authentic
Genuine condition photos
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About this watch

Released in 2020, the SBGE257 combines the latest in Grand Seiko technology with their most up-to-date aesthetics to create a truly contemporary timepiece. Powered by Grand Seiko’s infamously innovative Spring Drive technology, the SBGE257’s cal. 9R66 movement integrates the accuracy of quartz technology, which the Japanese watchmaker pioneered, with the aesthetics and craftsmanship of mechanical horology. Bursting onto the market in 2006, the self-winding cal. 9R66 was so far ahead of its time that 15 years later, it still transcends the competition. With 72 hours of power reserve and an accuracy of +/- 15 seconds a month, the 9R66 is virtually without fault. Beyond the movement, however, we have what Grand Seiko are most appreciated for: their dials. Coloured in a rich matte forest green, the dial is staggeringly beautiful. Featuring a rehaut half-board with green and silver halves to indicate night and day, the SBGE257’s GMT function is only used as a subtle design influence. Furthermore, the SBGE257’s dial seamlessly integrates its date function into itself as a false 4 o’clock hour marker, providing some balance to the power reserve indicator positioned at 8 o’clock. Finally, the SBGE257 features a subtle pop of colour in the form of a yellow GMT hand and matching yellow GMT inscription.


Year of Production
Case Size (mm)
Case Bezel Material
Stainless steel
Case Crystal
Case Dial Color
Dark Green
Case Dial Numbers
Indexes, luminescent
Case Material
Stainless steel
Caliber Movement
Calibre 9R66
Power Reserve
Number of Jewels
Water Resistance
Strap Color
Stainless steel
Strap Material
Stainless steel
Strap Clasp
Folding Clasp
Strap Clasp Material
Stainless steel
Hours, Minutes, Seconds, Date, Power reserve indicator, GMT