05/28/2026
Discover the Spring Drive U.F.A. Ushio 300 Diver SLGB023.
This model is Grand Seiko’s smallest diver’s watch powered by Caliber 9RB1, the most accurate with a Spring Drive movement.
The term ushio, which means “tide” in Japanese, evokes the waters that surround the Japanese archipelago.
Explore Grand Seiko at PD Watches.