Evolution 9 Diver 43.8mm "Ushio" Blue SLGA023G | 2024 Titanium Mint Full Set

The Story

Unveiled within Grand Seiko’s revolutionary Evolution 9 Collection, the SLGA023G redefines the professional luxury diver through the prism of Japanese aesthetic philosophy. The watch takes its inspiration from the "Ushio" (ocean currents), specifically the powerful Kuroshio Current that circulates off the coasts of Japan. The dial captures the undulating, dynamic surface of deep ocean swells, rendered in a mesmerizing textured navy blue. Combined with the ergonomic Evolution 9 design grammar—characterized by a lower center of gravity, wider bracelet geometry, and bold multi-faceted hands—this reference bridges extreme marine durability with true Haute Horlogerie hand-craftsmanship.

The Craft: High-Intensity Titanium, Zaratsu Finish & Calibre 9RA5

The 43.8mm case and bracelet are crafted from High-Intensity Titanium, an advanced alloy that is approximately 30% lighter than stainless steel while remaining far more resistant to scratches and saltwater corrosion. Grand Seiko’s artisans apply their signature Zaratsu distortion-free polishing along the lug chamfers, contrasting against fine satin-brushed planes. The unidirectional rotating diving bezel is fitted with a scratch-resistant gloss black ceramic insert with luminescent 60-minute graduations.

The blue "Ushio" dial features deep, organic wave textures that catch incoming light with three-dimensional depth. Grand Seiko's signature diamond-cut, faceted hands and three-dimensional applied indices are coated with high-potency Lumibrite that glows brightly in saturation-diving environments, balanced by a framed date window at 3 o'clock.

Beneath the solid caseback—bearing the iconic engraved Grand Seiko Lion medallion—beats the manufacture Spring Drive Calibre 9RA5. Engineered with dual-size barrels arranged in series, this revolutionary movement delivers a massive 120-hour (5-day) power reserve alongside an unmatched accuracy rating of ±10 seconds per month (±0.5 seconds per day). A dedicated vacuum-sealed IC package with built-in temperature sensor ensures thermal stability. Supported by a screw-down crown, the case provides a professional water resistance rating of 200 meters (660 feet).

Condition & Active 2029 Grand Seiko Factory Warranty

This collector-grade SLGA023G is presented in true Mint condition, displaying crisp case geometry, razor-sharp Zaratsu bevels, and spotless surfaces across its sapphire crystal, ceramic bezel, and titanium bracelet.

The timepiece arrives as a True Complete 2024 Full Set, complete with its original Grand Seiko presentation box, outer packaging, operating manuals, certificate folder, and the international warranty card dated in 2024—guaranteeing official factory warranty protection through 2029. Fully inspected and tested on our precision timing equipment, this high-spec titanium diver is backed by our 1-year Honeyrock mechanical warranty.