Grand Seiko Evolution 9: Precision and Craftsmanship

by Brent Robillard

The evolution of time

The Grand Seiko Evolution 9 SLGA015 is a watch that effortlessly combines precision, craftsmanship, and natural beauty—a true testament to what Grand Seiko does best. Released in 2022, the SLGA015 might still be a relatively recent addition to the brand’s lineup, but it remains worth revisiting for its masterful execution and the technology that powers it. Whether you’re a longtime fan of Grand Seiko or new to the brand, this is a timepiece that leaves a lasting impression.

^{Grand Seiko Evolution 9 SLGA015 @calibre321}

Key Features of the Grand Seiko Evolution 9 SLGA015

Case Dimensions and Finishing

At 43.8mm in diameter and 13.8mm thick, the SLGA015 is a substantial dive watch, yet it’s designed to wear comfortably thanks to the Evolution 9 design language. The lugs are beautifully sculpted, with a sharp inward taper that hugs the wrist for an ergonomic fit. Despite its larger size, the watch doesn’t feel overwhelming, thanks to the thoughtful proportions and titanium construction. Titanium keeps the case lightweight without compromising durability, which is essential for a professional-grade dive watch. Where Grand Seiko truly excels, though, is in the finishing. The case features their signature Zaratsu polishing, a painstaking hand-finishing technique that delivers distortion-free, mirror-like surfaces. Combined with the brushed sections, the SLGA015 has a dynamic, multi-dimensional appearance that’s stunning both in sunlight and under artificial light.

Dial Layout

The dial of the SLGA015 is a standout—an artistic triumph inspired by nature, as is often the case with Grand Seiko. Dubbed the “Black Stream” dial, it evokes the dynamic and powerful currents of the Kuroshio Current, a nod to the deep-sea origins of this dive watch. The wave-like texture plays beautifully with the light, creating depth and movement that make it difficult to look away. The applied hour markers and broad hands are generously filled with Lumibrite, ensuring excellent legibility even in the darkest underwater conditions. The date window at 3 o’clock is unobtrusive and well-integrated, maintaining the overall symmetry of the dial. This is more than just a functional dive watch face—it’s a piece of art that sets the SLGA015 apart from its competitors.

Titatnium Bracelet

Grand Seiko’s titanium bracelet continues the theme of comfort and durability. The links are solid, well-machined, and finished to the same high standards as the case, blending brushed and polished surfaces seamlessly. It feels light on the wrist, which makes a huge difference for a watch of this size, and the fit is superb thanks to a secure clasp with an extension system for divers. Whether you’re wearing it over a wetsuit or on bare skin, the Evolution 9 feels natural and refined, underscoring Grand Seiko’s focus on both form and function.

Spring Drive

Inside the SLGA015 beats the Spring Drive Calibre 9RA5, one of Grand Seiko’s most impressive technological achievements. The Spring Drive movement is unique to Seiko and Grand Seiko, combining the accuracy of quartz with the mechanical charm of a traditional watch movement. It delivers an incredible accuracy of ±10 seconds per month, far exceeding most mechanical watches on the market. The 9RA5 also boasts a 120-hour power reserve (5 days), making the Evolution 9 as practical as it is precise. The smooth gliding motion of the seconds hand is hypnotic and a signature feature of Spring Drive movements. It’s a reminder of Grand Seiko’s relentless pursuit of perfection and innovation.

Specs

Case	High-intensity Titanium 43.8mm Diameter 13.8mm Thick 22mm Lug Wdith Ceramic Bezel Insert Screw down & Case Back 200m of Water Resistance
Dial & Crystal	Sapphire Crystal Textured Dial Applied Markers Sword & Arrow Hands LumiBrite
Movement	9RA5 Spring Drive ±10/month 38 Jewels Offset Magic Lever Dual-size Barrels One-piece Centre Bridge Power reserve indicator 120-Hour Power reserve
Strap	Titanium Bracelet /w Folding Clasp & Diver’s Extension

Grand Seiko Evolution 9 SLGA015

Final Thoughts

The Grand Seiko Evolution 9 SLGA015 is a dive watch that goes beyond the typical tool-watch category. From its robust yet elegant case design to its nature-inspired dial and cutting-edge Spring Drive movement, this timepiece offers something truly special. It’s a watch that blends functionality with artistry, precision with soul.

Released in 2022, the SLGA015 remains as relevant today as it was upon its debut. It’s a testament to Grand Seiko’s ability to create timeless designs that are as much about emotional connection as they are about performance. If you’re looking for a dive watch that stands apart from the crowd and delivers exceptional craftsmanship, the SLGA015 is absolutely worth a second look.

Pricing & Availability

At the time of writing, you can shop this pre-owned at G em Bijou!

About the author

Brent Robillard is a writer, educator, craftsman, and watch enthusiast. He is the author of four novels. You can follow him on Instagram.

Take Two articles are full-length, hands-on reviews of vintage and preowned watches and represent the opinion of the author only. All photos are original, unless specified otherwise.

Please understand that using any links to products on this site might result in us making money.