Grand Seiko Heritage Collection "Shūbun" Hi-Beat 36000 – Ref. SBGH353

The Clarity of the Autumn Equinox Night Sky

Immerse yourself in the poetic passage of Japanese time with the Grand Seiko Heritage Collection "Shūbun" SBGH353. This exquisite luxury timepiece is inspired by Shūbun, the autumn equinox and sixteenth of the twenty-four sekki (seasons) that mark the year. The deep, rich blue dial captures the clear, crisp autumn night skies of Japan. Standing out in sharp, elegant relief against this midnight canvas are the gold-toned Grand Seiko lettering and a matching gold-toned seconds hand—a beautiful horological echo of the moon and stars illuminating the evening sky.

The dial layout utilizes razor-edged, multi-faceted hands and matching hour indices to give the watch face immense depth and dimensionality, ensuring perfect legibility under any lighting conditions.

62GS Bezel-Less Design in Ever-Brilliant Steel

The SBGH353 features a stunning 40mm case constructed in the iconic 62GS Style, a modern re-interpretation of Grand Seiko’s first automatic watch from 1967. This design is celebrated for its bezel-free construction and wide dial opening, which mounts the box-shaped sapphire crystal directly to the case for a distinctive, expansive wrist presence. The multi-sided case lines are treated with Grand Seiko's signature Zaratsu hand-polishing, creating flawless, distortion-free mirror surfaces that contrast beautifully with alternating brushed flanks.

For maximum longevity, both the case and the integrated three-link bracelet are forged from Grand Seiko’s proprietary Ever-Brilliant Steel. This premium alloy boasts a pitting resistance equivalent number (PREN) 1.7 times higher than standard luxury watch steel, giving it a brilliant white hue that naturally enhances the luster of the watch.

Hand-Assembled Mechanical Mastery

Beating inside this exceptional model is the high-performance, in-house Caliber 9S85 automatic movement. Hand-assembled by the elite master watchmakers at the Grand Seiko Studio Shizukuishi, this mechanical hi-beat caliber operates at an astonishing 36,000 vibrations per hour (10 beats per second). This high frequency allows the gold seconds hand to sweep with mesmerizing fluidity while providing a robust 55-hour power reserve and an incredible daily accuracy rating of +5 to -3 seconds. A see-through sapphire exhibition case back completes this masterpiece, putting the decorated, highly tuned mechanical engineering on full display.

• Brand: Grand Seiko

• Collection: Heritage Collection

• Model Number: SBGH353

• Movement: In-House Caliber 9S85 Mechanical Automatic Hi-Beat 36000

• Vibrations: 36,000 vph (10 Beats Per Second)

• Power Reserve: Approximately 55 Hours

• Accuracy Rating: +5 to -3 Seconds Per Day (Static)

• Case Material: Ever-Brilliant Steel (High-Corrosion Resistance & White Hue)

• Case Architecture: Modern 62GS Heritage Bezel-Less Construction

• Dial Presentation: Deep Blue Shūbun Autumn Equinox Sky with Gold Accents

• Crystal Profile: Box-Shaped Sapphire Crystal with Inner Anti-Reflective Coating

• Case Dimensions: 40.0mm Diameter / 12.9mm Thickness

• Bracelet Configuration: Ever-Brilliant Steel 3-Link Bracelet with Three-Fold Push-Button Release Clasp

• Case Back: See-Through Sapphire Exhibition Crystal

• Water Resistance: 100 Meters (330 Feet) / 10 Bar