Grand Seiko renews the core of its flagship Evolution 9 Collection.

Today, Grand Seiko is reintroducing the core models of its Evolution 9 Collection with a series of refinements. The updated lineup comprises nine new references: five featuring a 9R Spring Drive movement and four with a 9S mechanical movement. Building on the key pillars of aesthetics, legibility, and wearing comfort while exemplifying the tireless pursuit of the ultimate wristwatch, Grand Seiko’s Evolution 9 models represent the next step in the brand’s design and a further development of the Grand Seiko Style.

Los nuevos modelos incluyen un cierre con microajuste de tres posiciones que permite lograr un ajuste preciso sin necesidad de herramientas, con incrementos de 2 mm que añaden una mayor comodidad al llevarlos puestos. Todos los nuevos modelos, salvo uno, conservan un diámetro de 40 mm, aunque incluyen una correa con un grado de estrechamiento mayor que en los modelos anteriores. De los nueve nuevos modelos, siete están fabricados con Ever-Brilliant Steel*, una aleación de acero inoxidable conocida por su excepcional resistencia a la corrosión y su color brillante, mientras que dos están fabricados con titanio de alta intensidad.

*Este acero inoxidable tiene un valor PREN (índice de equivalencia de resistencia a la corrosión por picaduras) superior a 40, lo que lo clasifica como acero inoxidable de alta resistencia en la industria siderúrgica. La PREN es una norma ampliamente aceptada para medir la resistencia a la corrosión..

Todos los nuevos modelos de la colección Evolution 9 cuentan con los movimientos más vanguardistas de Grand Seiko. Los modelos Spring Drive están equipados con el calibre 9RB2, que se presentó en 2025. Con una precisión anual excepcional de ±20 segundos, este movimiento ofrece 72 horas de autonomía de funcionamiento. En cuanto a los modelos mecánicos, el calibre insignia 9SA5 ofrece una precisión de alta frecuencia y una reserva de marcha de 80 horas.

La esfera del lago Suwa también está disponible en negro, un color totalmente nuevo para este diseño. Esta versión evoca la superficie del agua iluminada por la luz de la luna a medianoche. La caja y el brazalete están fabricados con titanio de alta intensidad, un material brillante y lustroso que es aproximadamente un 30 % más ligero y resistente a los arañazos que el acero inoxidable, aumentado así su durabilidad.

Equipped with the Spring Drive U.F.A. Caliber 9RB2

Introduced in 2025, the Spring Drive U.F.A., standing for “Ultra Fine Accuracy,” boasts an annual accuracy of ±20 seconds, making it the most accurate wristwatch movement on the market powered by a mainspring today.* To ensure this precision, both the crystal oscillator and the IC are vacuum-sealed, and the oscillator is stabilized through a unique aging process. Vacuum sealing minimizes the influence of external factors such as temperature, humidity, static electricity, and light, thereby enabling high accuracy. Each oscillator’s frequency is measured at multiple temperatures, and the resulting data is programmed into the low-power IC to enable precise thermo-compensation. The movement features a regulation switch that can be used during after-sales service to correct any divergences in accuracy that may occur over long periods of use.

* As of June 2026, based on Grand Seiko’s research.

The new Spring Drive creations will be available at the Grand Seiko Boutiques and select retail partners worldwide beginning in September 2026.

Four signature models from the Evolution 9 Collection, equipped with the flagship mechanical Caliber 9SA5, are refreshed

A dial inspired by a white birch forest near the Grand Seiko Studio Shizukuishi, the center of Grand Seiko mechanical watchmaking, stands among the most popular designs in the brand’s lineup. Its vivid pattern captures the essence of these magnificent trees and evokes the crisp clarity of highland air. Iwate Prefecture, home to the Grand Seiko Studio Shizukuishi, boasts Japan’s largest forest of white birch, a fast-growing, sun-loving species with remarkable vitality. The trees’ straight, white trunks reaching toward the sun evoke both beauty and strength. Inspired by the vast expanse of these trees stretching endlessly across the landscape, the textured dial aptly conveys the depth and richness of the forest. The new creation retains the same dial pattern as the original model while introducing Ever-Brilliant Steel for the case and bracelet. It is further enhanced with a micro-adjustment clasp, offering both refined comfort and modern functionality.

Stretching over two kilometers along the Iwai River in Iwate Prefecture, near the Grand Seiko Studio Shizukuishi, the Genbi Valley offers a captivating blend of untamed scenery and gently flowing water. The textured dial pattern of another mechanical creation reflects the valley’s distinctive rock formations, while its light blue color evokes the crisp, refreshing stream in summer.

Powered by the mechanical Caliber 9SA5, delivering 36,000 vibrations per hour and a power reserve of 80 hours

All four of the new mechanical creations are powered by Grand Seiko’s Caliber 9SA5. This movement achieves approximately 80 hours of power reserve while operating at a high frequency of 36,000 vibrations per hour, thanks to the adoption of the Dual Impulse Escapement and a twin-barrel system with two mainsprings. In addition to its high performance, Caliber 9SA5’s proprietary horizontal gear-train layout enables a notably slim profile. The movement is crafted by highly skilled artisans at the Grand Seiko Studio Shizukuishi, a workshop steeped in rich natural surroundings, overlooking majestic Mount Iwate in the distance. A tribute to the studio’s surroundings, the movement’s bridge has a gently curved outline inspired by the shape of Mt. Iwate and a bend in the nearby Shizukuishi River, which runs past the studio.

The new mechanical creations will be available at the Grand Seiko Boutiques and select retail partners worldwide beginning in October 2026.