For Watches & Wonders 2025, the collection introduces the groundbreaking Spring Drive Calibre 9RB2, earning the designation "U.F.A."—Ultra Fine Accuracy. This revolutionary movement redefines precision in watchmaking, with accuracy measured on an annual rather than daily basis. The automatic U.F.A. movement achieves an unprecedented annual rate of ±20 seconds, establishing it as the most accurate mainspring-powered wristwatch movement available today.
The new Grand Seiko E9 Spring Drive U.F.A. SLGB001 is cased in platinum and available in a limited edition of only 80 pieces to be exclusively sold at Grand Seiko Boutiques worldwide. The watch much like its High-Intensity Titanium counterpart, features a dial design that draws inspiration from the ice forests of the Kirigamine Highlands near the Shinshu Watch Studio. With a platinum case measuring 37 mm in diameter, its intricately textured dial features a light blue hue—between light lavender and blue to the naked eye—that evokes frost-covered trees in winter, and the watch is delivered on a black alligator strap.
Turning the watch over reveals the new exceptionally accurate automatic calibre 9RB2 that stems from several technical innovations that include: enhanced manufacturing processes for the three-month-aged quartz oscillator, a newly designed integrated circuit, a temperature compensation programming based on measurements at various temperatures, a vacuum-sealed oscillator and sensor to minimize environmental interference, and a regulation switch that allows accuracy adjustments during servicing. The annual accuracy rate is measured at ±20 seconds.
The movement provides a 72-hour power reserve which can be tracked through the power reserve indicator on the back of the watch. The Spring Drive Calibre 9RB2 movement is equipped with a skeletonized oscillating weight with ‘Spring Drive Ultra Fine Accuracy’ written on it. In our opinion a little bit too much text that cheapens the watch.
The Grand Seiko E9 Spring Drive U.F.A. SLGB001 in platinum wears exceptionally well on the wrist and is not too heavy despite its platinum construction with a total weight of only 132 grams. The watch strikes that perfect balance between presence and comfort on the wrist. The platinum case provides a luxurious feel with noticeably more weight than its titanium counterpart.
Sticker Price USD 39,000. For more info on Grand Seiko click here.
