Grand Seiko Spring Drive 5 Days Evolution 9

The Atera Valley is one of the foremost places of scenic beauty in Nagano Prefecture. As the vibrant natural environment changes in expression throughout the four seasons, the clear waters form a singular beauty referred to as “Atera blue,” and enchant the hearts of all who visit them. Through a combination of highly transparent blue-green color gradations, this watch expresses the eternal flow of time evident in the formation of the valley. The case and bracelet are high-intensity titanium, a metal 30 percent lighter than steel and highly resistant to rust, corrosion and scratches. This watch is powered by Grand Seiko’s Spring Drive Caliber 9RA2, a movement that maintains a level of performance comparable to that of the innovative Caliber 9RA5, which debuted in 2020. With Caliber 9RA2, the power reserve indicator is on the back to further slim down the watch’s profile. The case back shows the movement, which has a subtle feeling of the “Shinshu Frost,” a conceptualization of the frost that can be seen throughout the Shinshu region during periods of intense cold. This representation resonates with the power reserve indicator hand, which is tempered to a beautiful shade of blue, to communicate a peaceful expression.