Grand Seiko’s Evolution 9 Collection Gains Nine New Watches

To celebrate its 60th anniversary in 2020, Grand Seiko introduced the Evolution 9 as a showcase of a design language the watchmaker first expressed in 1967. Debuting with a single watch, the collection quickly grew, with new models (both high-end complications and sports chronographs) being added every year.

This year, it launched nine new watches for the collection, comprising five Spring Drive models and four mechanical Hi-Beat creations. At first glance, the changes embodied in these watches may appear subtle, but a closer inspection will show that there is a lot more going on than a mere cosmetic refresh. These updates can be understood across three areas: comfort, technical development and aesthetics. 

Built for a Better Fit

One of the biggest and most practical changes seen in the new models is that each one boasts  a three-step micro-adjustment clasp. This allows the bracelet to be adjusted in 2mm increments without the need for tools. The wearer does this by raising and pressing the bracelet end to disengage a spring-loaded pin from inside the clasp, then sliding the bracelet to the desired position and releasing it to lock it in place. 

Grand Seiko has also revised the bracelet profile, giving it a greater degree of taper than previous iterations. It now tapers from 22mm to 18mm on the 40mm watches, and from 20mm to 16mm on the 37mm model. This reduces bulk and helps the watch to fit more comfortably around the wrist.

Seven of the nine references are now crafted from Ever-Brilliant Steel, while two use High-Intensity Titanium. The shift to Ever-Brilliant Steel is particularly notable for models previously offered in conventional stainless steel. The alloy has a PREN, or Pitting Resistance Equivalent Number, of more than 40, placing it within the category of what the steel industry describes as “super stainless steel”. In practical terms, it offers a high degree of corrosion resistance while also delivering the brighter, whiter lustre that has become characteristic of Grand Seiko’s more recent steel watches.

Pushing Precision Further

Next, technical development. The word “precision” is often (over)used when trying to convey technical prowess in luxury watchmaking, but the figures behind Caliber 9RB2 might actually warrant the use of the word here. Caliber 9RB2 is Grand Seiko’s Spring Drive U.F.A. movement, with U.F.A. standing for Ultra Fine Accuracy. 

Introduced in 2025, the movement is rated to an extraordinary accuracy of ±20 seconds per year. That figure deserves some context. The previous Caliber 9RA2 was already an exceptionally accurate movement, rated at approximately ±10 seconds per month. Caliber 9RB2 reduces that annual variation to just ±20 seconds. In other words, Grand Seiko has made an already highly accurate movement even more accurate, elevating it to an extraordinary level of precision.

All this is achieved through a combination of factors, like the vacuum sealing of the watch components, a master regulation switch, thermo-compensation programming and the use of three-month aged quartz in its crystal oscillators for stability. As of June 2026, Grand Seiko described the Caliber 9RB2 as the most accurate mainspring-powered wristwatch movement on the market. And it now powers all five Spring Drive models.

The Art of the Dial

Among the renewed Spring Drive models are several watches built around dial designs that have already become familiar to Grand Seiko collectors. Most notably, the Lake Suwa motif returns in three references, including the 40mm SLGB013, the more compact 37mm SLGB015 and the High-Intensity Titanium SLGB007.

The blue versions are perhaps the most immediately recognisable. At first glance, it looks like very little has changed — the textured pattern remains the same, inspired by the surface of Lake Suwa, located to the southeast of the Shinshu Watch Studio in Nagano. A closer look however, reveals that the blue used for the SLGB013 and SLGB015 is lighter than the previous iterations of the Lake Suwa dial, and is intended to evoke sunlight reflecting across the surface of the water in the morning. It is a nuanced change that becomes more apparent when the dial catches the light. 

The SLGB007 takes the motif in the opposite direction. For the first time, the Lake Suwa texture is presented on the dial in a black sunray pattern, to recall the appearance of water illuminated by moonlight. Paired with a case and bracelet in High-Intensity Titanium, it gives the familiar pattern a considerably darker character. The Spring Drive line-up also includes the SLGB009, which was inspired by the white birch forests surrounding the Shinshu Watch Studio, with the dial boasting the vertical striations that conjure the textured bark of the trees while the SLGB011 features a green dial — referencing the emerald waters of the Atera River in Nagano Prefecture.

While nature has always remained a central visual theme of Grand Seiko’s collections, the manufacturer continues to find new ways of interpreting its surrounding landscapes by utilising new textures and perspectives.

The Landscape of Evolution 9

The four mechanical models receive a similarly measured makeover. The SLGH031 revisits one of Grand Seiko’s most popular contemporary dial designs — the white birch pattern inspired by the forests surrounding the Grand Seiko Studio Shizukuishi in Iwate Prefecture. The dial itself remains unchanged, with the updates focused on the case and bracelet. The SLGH031 now uses Ever-Brilliant Steel and receives the new micro-adjustment clasp. 

The theme continues with the SLGH029, which presents the birch motif in black to evoke the stillness of the forest at night. Its High-Intensity Titanium construction further reinforces this darker interpretation while keeping the watch lighter on the wrist.

The SLGH033 takes the same landscape in another direction, presenting the pattern in green to suggest birch trees illuminated by summer sunlight. The SLGH035, meanwhile, moves away from the forest entirely, drawing inspiration from the flowing waters in the Genbi Valley with the soft shimmer of its pale turquoise dial. 

Powering all four watches is the Caliber 9SA5, Grand Seiko’s flagship high-beat mechanical movement, which also carries a connection to its surroundings. Produced at the Grand Seiko Studio Shizukuishi, its open caseback reveals distinctively shaped architecture — flowing movement bridges with a curved profile that bring to mind the silhouette of Mount Iwate and the shapes of the banks of the nearby Shizukuishi River.

It is a small example of how Grand Seiko’s relationship with its environment permeates almost every aspect of the watch design in its Evolution 9 collection. The landscapes surrounding its studios directly influence the design process, and manifest in the textures and colours of the watches and even the physical architecture of the movement itself. That same philosophy ultimately defines this update to the Evolution 9 collection. From greater precision and improved ergonomics to new interpretations of natural landscapes, these nine references demonstrate how incremental changes can give new life to an established design.

The five new Spring Drive models will be available at Grand Seiko Boutiques and select retail partners worldwide from September 2026, followed by the four mechanical references in October 2026.