Grand Seiko ushers in a new era of Ultra Fine Accuracy with the SLGB003, powered by the revolutionary Spring Drive Caliber 9RB2 Published: Fri 16 May 2025, 5:26 PM Updated: Mon 2 Jun 2025, 6:13 PM By: ...

Headlining the showcase were the Tentagraph Grand Seiko’s first mechanical chronograph integrated into the bold Tokyo Lion design and the Spring Drive U.F.A., featuring a world-leading ±20 ...

As for power, it runs on the brand’s Spring Drive 9R01 movement, which delivers exceptional accuracy of ±0.5 seconds per day and a remarkable 192-hour power reserve.