Grand Seiko · Family: Evolution 9
The Grand Seiko SLGA015, nicknamed 'Ushio' (Japanese for tide/current), is a Spring Drive dive watch in high-intensity titanium, 43.8mm, part of the Evolution 9 collection through which Grand Seiko refined its design language ('Grand Seiko Style') in 2020 for greater legibility and comfort. It runs the Spring Drive Caliber 9RA5, with 120 hours of power reserve and ±10 seconds per month accuracy. Cazador has no verified price observations yet for this reference. Its stand-out detail: the textured black dial is inspired by the Kuroshio Current ('Black Stream'), the major ocean current running along Japan's coast.
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Insufficient data: 0 price observations recorded as of today. Cazador does not estimate or infer a range without our own verified market data.
Grand Seiko was born on December 18, 1960, at Seiko's Suwa facility in Japan, with the stated goal of building 'the ideal watch.' For decades it lived as a high-end sub-brand within Seiko's catalog, until in 2017 it formally split off as an independent brand, with its own logo and commercial presence, while remaining under the same corporate group.
In 2020 Grand Seiko introduced Evolution 9 — not a model collection but a refinement of the 'Grand Seiko Style,' the brand's design codes around legibility, surface finishing, and wrist comfort — later applied to new cases and dials across several of the house's families, including its diver line.
The SLGA015 joined the catalog in August 2022 as part of that collection, carrying the unofficial nickname 'Ushio' collectors use for its textured black dial, inspired by the Kuroshio Current running along Japan's east coast. Beneath that dial beats the Spring Drive Caliber 9RA5, the technology through which Grand Seiko pairs a conventional automatic mechanism with a quartz-regulated glide wheel, eliminating the characteristic tick of mechanical watches and achieving ±10 seconds per month accuracy, well beyond a traditional automatic's standard.
With 120 hours of power reserve, a 43.8mm high-intensity titanium case, and 200 meters of dive-certified water resistance, the SLGA015 pairs dive-tool robustness with the alternating mirror and satin finishing that defines Grand Seiko's watchmaking. This is the first Evolution 9 collection reference Cazador adds, extending Grand Seiko coverage beyond the Heritage Collection and Sport Collection already in the catalog.
Cazador has 0 verified price observations recorded for this reference as of today, so we don't publish a range or estimate. Once we have our own verified market data, we'll update this page.
A Seiko/Grand Seiko-exclusive technology that pairs a conventional automatic mechanism with a quartz-regulated glide wheel, eliminating the tick of a mechanical seconds hand and achieving ±10 seconds per month accuracy.
It's an unofficial nickname used by collectors: 'Ushio' means 'tide/current' in Japanese and refers to the textured black dial, inspired by the Kuroshio Current running along Japan's east coast.
It's the refinement of the 'Grand Seiko Style' the brand introduced in 2020, focused on improving legibility, surface finishing, and wrist comfort, later applied to several catalog families including the dive line.
Approximately 120 hours (5 days), thanks to the Spring Drive Caliber 9RA5, well beyond the 2-3 days typical of a conventional automatic movement.
Yes, it's dive-certified with 200 meters of water resistance, a unidirectional ceramic bezel, and 4,800 A/m magnetic resistance.
Since 2017, when its split into its own brand with independent logo and commercial presence was formalized, though Grand Seiko's origin as a line dates back to December 18, 1960.