BIRTH YEAR PRESENT

Grand Seiko

Spring Drive U.F.A. Ushio 300 Diver

The 2026 U.F.A. 300m diver generation brings ±20 seconds per year accuracy to a professional diver with the new Caliber 9RB1.

History timeline

  1. 2026

    Introduced

Evolution 9 Spring Drive U.F.A.

Explore the Lineage

  1. 2025 — Grand Seiko Spring Drive U.F.A. SLGB001 / SLGB003Current model
  2. 2026 — Grand Seiko Evolution 9 Spring Drive U.F.A. Core GenerationCurrent model
  3. 2026 — Grand Seiko Spring Drive U.F.A. Ushio 300 DiverCurrently viewing
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Source: Grand Seiko — U.F.A. 300m Diver Press Release

BIRTH YEAR PRESENT | Spring Drive U.F.A. Ushio 300 Diver