The Grand Seiko SLGA025 is an Evolution 9 Collection Spring Drive 5 Days watch powered by Caliber 9RA2. Grand Seiko describes its dial as inspired by the clear emerald-green waters of Japan’s Atera River and the natural harmony of Atera Valley; its US boutique calls the color “Atera Blue.” The available official model information establishes its specifications, but not its original debut date, so the model should not be described as a new 2026 release.
What is the Grand Seiko SLGA025?
SLGA025 is a Spring Drive model in Grand Seiko’s Evolution 9 Collection. Its automatic movement can also be wound by hand, and the brand identifies it as Caliber 9RA2. “Spring Drive 5 Days” refers to the movement’s approximately 120-hour power reserve, not a separate complication or a five-day accuracy claim.
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Grand Seiko’s Greek listing describes the dial inspiration as the clear emerald-green waters of the Atera River and the natural harmony of Atera Valley. The US boutique uses the color name “Atera Blue.” These are the brand’s descriptions of the dial’s inspiration and color; they do not mean the dial literally depicts the river or valley. Grand Seiko Greece’s SLGA025 listing and the Grand Seiko US boutique listing provide those descriptions.
What are the SLGA025 specifications?
Grand Seiko UK lists the following model specifications. These are manufacturer-published figures, not independent test results. Grand Seiko UK’s SLGA025 specifications are the source for the dimensions and performance figures below.
#1 Best Overall
- See-through case back
- Date display
- Screw-down crown
- 40mm Diameter
- Weight 178.0 g
| Specification | Grand Seiko listing |
|---|---|
| Reference | SLGA025 |
| Collection | Evolution 9 |
| Movement | Spring Drive automatic with manual winding, Caliber 9RA2 |
| Case material | High-intensity titanium |
| Case diameter | 40.0 mm |
| Lug-to-lug | 47.9 mm |
| Thickness | 11.8 mm |
| Band width | 22 mm |
| Power reserve | Approximately 120 hours (five days) |
| Accuracy | ±10 seconds per month (±0.5 second per day) |
| Water resistance | 10 bar |
| Magnetic resistance | 4,800 A/m |
| Weight | 112 g |
Is the SLGA025 part of Grand Seiko’s 2026 Evolution 9 refresh?
Grand Seiko’s June 24, 2026 announcement describes a refresh of the Evolution 9 Collection with nine new references: five Spring Drive and four mechanical. It says the new Spring Drive creations would be available at boutiques and select retail partners worldwide beginning in September 2026. The announcement provides collection context, but does not identify SLGA025 as one of those new references or establish when this model debuted. See Grand Seiko’s June 24, 2026 Evolution 9 announcement.
Independent reader supportYour contribution helps us test, update, and keep practical guides available for everyone.How much does the SLGA025 cost?
Regional official listings show different prices: Grand Seiko UK displayed GBP 9,600, while its Greece page displayed EUR 11,300. These are prices for separate regional markets, not a currency conversion or a universal price. Listings and availability can change, so check the relevant local Grand Seiko page or boutique for current information. The UK listing includes boutique and store purchase paths; the 2026 collection announcement names boutiques and select retail partners for the new Spring Drive creations.
Quick Recap
Rank #2
- Three-fold clasp with push button release
- Dual-curved sapphire crystal
- Power reserve display on the back
- Power resrve Approx. 72 hours(3 days)
Product prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on Amazon at the time of purchase will apply.
