SJX Watches
Hands On: Grand Seiko Spring Drive UFA Ushio 300 Diver SLGB025 and SLGB023
At Watches & Wonders, Grand Seiko launched its best dive watch yet, the Evolution 9 Spring Drive Ultra Fine Accuracy (UFA) Ushio 300 Diver SLGB023 and SLGB025. As a product, it is both shocking and obvious, combining everything Grand Seiko collectors have longed for: a moderately sized case, an improved bracelet and clasp, and a 300 m depth rating. It all comes packaged in a titanium case and an enthusiast-favourite no-date format, and retails for slightly less than Grand Seiko’s existing premium dive watches. It’s a strong statement from a brand looking to gain traction in the luxury sports watch segment. Initial thoughts Seiko’s dive watch pedigree is one of the strongest in the industry, from their iconic saturation divers of the late 1960s to the gone but not forgotten SKX. Yet the flagship Grand Seiko brand has struggled to field a compelling dive watch. Bulky cases, strange proportions, odd depth ratings, and clumsy clasps held back past offerings. Fortunately, Grand Seiko has finally overcome these shortcomings and can finally boast a highly competitive diver’s watch. I made a wishlist for Watches & Wonders 2026 not long ago, at the top of which was my vision for a Grand Seiko UFA Spring Drive diver. To be clear, I’d already known a dive watch using the new cal. 9RBx family of Spring Drive movements was coming based on trademark filings, but I wished for something that many Grand Seiko collectors have wanted for years – a moderately sized dive watch, wit...
