Grand Seiko SBGH349 Icefall

Ice-Inspired Dial

Words by: Hourstriker Staff
December 18, 2024
Delving into the world of fine watchmaking, Grand Seiko consistently pushes the boundaries of precision, innovation, and craftsmanship. The latest addition to their Heritage Collection, the SBGH347, aptly nicknamed the "Icefall," is a testament to their unwavering dedication to horological excellence. This timepiece not only showcases a beautiful dial design but also boasts a high-beat mechanical movement, making it a true marvel for watch enthusiasts and collectors alike. Its design draws inspiration from the breathtaking scenery of Mount Iwate, the majestic peak visible from the Grand Seiko Studio Shizukuishi, which serves as the heart of Grand Seiko's mechanical watchmaking. The dial captures the essence of an icefall, a phenomenon where water freezes as it cascades down the mountain, creating a mesmerizing spectacle of nature's artistry.



This "Icefall" watch, reference SBGH347, is more than just a visually appealing timepiece; it's a representation of Grand Seiko's mastery in watchmaking. The dial, with its intricate pattern and icy-blue color, mirrors the dynamic and detailed texture of a frozen waterfall. This design element is not merely aesthetic; it's a tribute to the natural beauty found in Hachimantai, Iwate Prefecture, specifically the Nanataki waterfall. This 30-meter cascade transforms into a stunning display of icicles during the coldest months, a scene now immortalized on the wrist of those who wear this remarkable watch. The unique blueish-white hue of the dial perfectly captures the enigmatic beauty of the ice, offering a constantly shifting visual experience depending on the light and angle.

Courtesy of Grand Seiko


A closer look at the SBGH347 reveals a classic Grand Seiko case design, a nod to the brand's rich heritage. With a diameter of 40mm, the case strikes a perfect balance between presence and wearability. It's crafted from Ever-Brilliant Steel, a material renowned for its superior corrosion resistance. This particular steel boasts a PREN (Pitting Resistance Equivalent Number) that is 1.7 times higher than that of the stainless steel commonly used in high-end watches. The material's bright white sheen further enhances the watch's aesthetic appeal, complementing the icy-blue dial beautifully.



The case back of the SBGH347 is just as impressive as its front. Featuring a see-through design with a screw-down mechanism, it offers a glimpse into the heart of the watch: the Caliber 9S85 movement. This high-beat mechanical movement is a marvel of engineering, developed after years of meticulous research and development. Operating at a frequency of 36,000 vibrations per hour (10 beats per second), it achieves exceptional accuracy, with a mean daily rate of +5 to -3 seconds. Despite its high frequency, the movement maintains a power reserve of approximately 55 hours when fully wound, a testament to its efficient design.



The bracelet of the SBGH347 is also made from Ever-Brilliant Steel, ensuring a cohesive and refined look. Its three-fold clasp with a push-button release provides both security and ease of use. The bracelet's perimeter of 192mm comfortably accommodates most wrist sizes. With a lug-to-lug measurement of 44.6mm and a thickness of 13.3mm, the watch sits comfortably on the wrist without feeling bulky. The band width of 19mm adds to its balanced proportions. The use of this high-grade steel ensures not only durability but also a comfortable wearing experience, free from the worry of corrosion or tarnish.

Courtesy of Grand Seiko


The glass used in the SBGH347 is a dual-curved sapphire crystal, known for its exceptional scratch resistance and clarity. An anti-reflective coating on the inner surface enhances visibility, allowing the intricate dial details to shine through without any glare. The watch's water resistance of 10 bar (approximately 100 meters) makes it suitable for everyday wear, although it's not designed for deep-sea diving. This level of water resistance adds to the watch's practicality, ensuring it can withstand splashes and brief immersions without compromising its functionality.



Grand Seiko's commitment to precision is further exemplified by the meticulous testing each movement undergoes. The mean daily rate is determined by measuring the movement in six positions under controlled conditions for 12 days before it's assembled into the case. This rigorous testing process ensures that each watch meets Grand Seiko's stringent accuracy standards, giving owners the confidence that their timepiece will perform reliably day after day. This meticulous attention to detail is what sets Grand Seiko apart in the world of luxury watches.



The development of the Caliber 9S85 movement was no small feat. It involved rethinking the fundamental components that contribute to the watch's precision. The hairspring, a critical element in any mechanical movement, is made from a new generation of Spron alloys. These alloys, developed after five years of research, offer twice the impact resistance and three times the magnetic resistance of previous alloys. This advancement ensures that the movement remains accurate even under challenging conditions, maintaining its precision over time.

Courtesy of Grand Seiko


The escapement mechanism, another vital component, benefits from MEMS (Micro Electro Mechanical System) technology. This technology, originally developed for semiconductor manufacturing, allows for the creation of lighter and smoother components with a precision of one ten-thousandth of a millimeter. The escape wheel, for instance, features a new design with oil reservoirs at the end of each gear tooth, improving oil retention and ensuring smooth operation. This level of engineering precision is crucial for maintaining the high beat rate and overall accuracy of the movement.



To power the high-frequency movement, Grand Seiko developed a new mainspring using a specially designed alloy. This mainspring provides about 6% more power and an additional five hours of power reserve compared to its predecessors, all while maintaining the same level of corrosion resistance, durability, and magnetic resistance. The result is a movement that can run for 55 hours when fully wound, providing ample power for daily use without the need for frequent winding. This focus on innovation and improvement is a hallmark of Grand Seiko's approach to watchmaking.



Grand Seiko's philosophy centers on creating the world's best watch, a goal they pursue relentlessly. Each timepiece is a true manufacture product, combining the latest technology with traditional craftsmanship. The hands-on approach ensures that every detail, from the movement to the finishing, meets the highest standards. The artisans at the Grand Seiko Studio Shizukuishi bring decades of experience and a passion for perfection to their work, resulting in watches that are not only technically impressive but also works of art.

Courtesy of Grand Seiko


When a watch collector first lays eyes on the SBGH347, they're immediately drawn to the captivating dial. The icy-blue hue, reminiscent of a frozen waterfall, is both striking and unique. The dynamic pattern on the dial creates a sense of depth and movement, as if the ice is slowly shifting and changing with the light. The applied hour markers and hands are meticulously polished, reflecting light in a way that enhances readability and adds to the watch's overall brilliance. The date window at 3 o'clock is discreet yet functional, maintaining the dial's clean and uncluttered look.



Turning the watch over, the see-through case back reveals the intricate Caliber 9S85 movement in all its glory. The finely decorated components, including the rotor with its intricate engraving, showcase the level of craftsmanship that goes into each Grand Seiko watch. The movement's smooth operation and the rhythmic ticking of the high-beat escapement are mesmerizing to watch, providing a constant reminder of the mechanical marvel within. This view into the inner workings of the watch is a treat for any watch enthusiast, offering a deeper appreciation for the engineering and artistry involved.



The tactile experience of the SBGH347 is just as satisfying as its visual appeal. The Ever-Brilliant Steel case and bracelet feel substantial and well-made, with a weight of 142 grams that conveys a sense of quality. The smooth, polished surfaces contrast beautifully with the brushed finishes, creating a play of light and shadow that highlights the watch's elegant lines. The crown, with its screw-down mechanism, is easy to operate and feels secure when adjusting the time or date. The three-fold clasp on the bracelet is both comfortable and reliable, ensuring that the watch stays securely on the wrist.

Courtesy of Grand Seiko


Wearing the SBGH347 is a pleasure. Its 40mm case size is versatile enough for both formal and casual occasions, and the watch's sleek profile allows it to slip easily under a shirt cuff. The weight is well-distributed, making it comfortable for extended wear. The sapphire crystal's anti-reflective coating ensures excellent visibility in all lighting conditions, allowing the beautiful dial to be appreciated without any distracting glare. The watch's overall design is harmonious and balanced, with each element working together to create a cohesive and visually appealing whole.



The Grand Seiko Heritage Collection Mechanical Hi-Beat 36000 SBGH347, the "Icefall," is priced at USD 6,900.00. This price point reflects the watch's exceptional craftsmanship, innovative movement, and use of high-quality materials. While it represents a significant investment, it's a fair price for a timepiece of this caliber. The watch is available through authorized Grand Seiko dealers and boutiques, as well as online. Given its unique design and technical prowess, the SBGH347 is likely to be a sought-after piece among collectors and enthusiasts, further solidifying its value.



Case: The case is crafted from Ever-Brilliant Steel, measuring 40mm in diameter, 44.6mm lug-to-lug, and 13.3mm in thickness. It features a see-through, screw-down case back made from Ever-Brilliant Steel and sapphire crystal. The watch boasts a dual-curved sapphire crystal with an anti-reflective coating on the inner surface and has a water resistance of 10 bar.



Movement: The watch is powered by the Caliber 9S85, a high-beat automatic movement with manual winding capability. It operates at 36,000 vibrations per hour (10 beats per second) and offers a power reserve of approximately 55 hours. The movement has a mean daily rate of +5 to -3 seconds per day and features 37 jewels.



Dial: The dial showcases a unique icy-blue color and a dynamic pattern inspired by the icefalls of Mount Iwate. It features applied hour markers and hands, along with a date display at 3 o'clock. The dial's intricate design and color capture the essence of a frozen waterfall.



Strap: The bracelet is made from Ever-Brilliant Steel, matching the case material. It features a three-fold clasp with a push-button release for secure and comfortable wear. The bracelet has a perimeter of 192mm and a band width of 19mm.



Price: The watch is priced at USD 6,900.00.



Notes: The SBGH347's Ever-Brilliant Steel has a PREN (Pitting Resistance Equivalent Number) 1.7 times higher than standard stainless steel used in luxury watches, offering exceptional corrosion resistance. The Caliber 9S85 movement utilizes advanced materials like the new generation Spron alloys for the hairspring and MEMS technology for the escapement mechanism, ensuring enhanced precision and durability.
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