Grand Seiko Japan Seasons Special Edition Mechanical Hi-Beat 36000 SBGH273

Under the moonlight, the night is quiet except for the last of the chirping crickets. The bright moon against the dark sky in Japanese is known as tsukiyo.
The dial of this model is a dark blue to celebrate the autumnal equinox and represent the autumn clouds as they float through the sky.

Case Design: The Iconic 62GS Modern Reinterpretation 
Launched in 1967, the 62GS was Grand Seiko’s first automatic movement. This timepiece gained popularity for its striking design featuring a mirrored, multi-sided case and wide dial opening, which was achieved with bezel-free construction and Seiko’s signature Zaratsu polishing technique. Pure, refined, and noble, the 62GS is a treasured classic.

From the Shizukuishi Watch Studio in Iwate Prefecture, this sophisticated, modern movement makes use of innovations to its mainspring, hairspring, and escapement to improve precision. The movement demonstrates the pure power of the Mechanical Hi-Beat 36,000.

Calibre 9S85: 

The challenge of making a high-beat movement is one that only a few watchmakers choose to accept. With its higher oscillation rate of ten beats per second, greater accuracy is achievable, but this increased precision comes at a price because the faster rotational speed can take its toll on the power reserve and even the longevity of the whole movement. Grand Seiko's 10 beat movement meets these challenges and delivers an accuracy of +5 to –3 seconds a day, a power reserve of 55 hours and the durability for which every Grand Seiko watch is renowned. Caliber 9S85 is the result of many years of development and of advances both in the design and manufacture of components and in the materials themselves.

Driving system
Automatic with manual winding mechanism

Mean daily rate
+5 to -3 seconds per day

Normal usage accuracy
+8 to -1 seconds per day

Power reserve
Approximately 55 hours

Vibrations
36,000 vibrations per hour

Number of jewels
37 jewels

Features
- Date display