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The Grand Seiko SBGH347 “Nanataki” is a 37 mm Heritage Collection automatic with a high-beat 9S85 movement and an ice-blue dial inspired by a frozen waterfall in Iwate, Japan. Its case measures 44.6 mm lug-to-lug and 13.3 mm thick; Grand Seiko lists about 55 hours of power reserve. Official prices differ by market: the Japanese listing is ¥946,000 including tax, while Grand Seiko’s Middle East page lists USD 6,900.
What is the Grand Seiko SBGH347 Nanataki?
SBGH347 is a Heritage Collection Mechanical Hi-Beat 36000 watch. Its name and dial draw on Nanataki, a 30-meter waterfall in Hachimantai, Iwate Prefecture, originating from a stream flowing down Mount Iwate. Grand Seiko describes the dial as depicting the waterfall in its frozen state, with an ice-blue color and a pattern intended to evoke the movement and detail of frozen water. Those descriptions are the manufacturer’s, not an independent assessment of the dial.
The case is made from Ever-Brilliant Steel and has a see-through screw caseback. A dual-curved sapphire crystal with anti-reflective coating on the inner surface covers the dial. Grand Seiko’s product page provides the regional product specifications.
How big is the SBGH347, and how might it wear?
| Measurement | Official specification |
|---|---|
| Case diameter | 37.0 mm |
| Lug-to-lug | 44.6 mm |
| Thickness | 13.3 mm |
| Band width | 19 mm |
| Listed weight | 142 g |
The 37 mm diameter is only part of the fit picture: the 44.6 mm lug-to-lug length helps indicate how far the watch spans across the wrist, while its 13.3 mm thickness may make it feel more substantial than the diameter alone suggests. These dimensions do not establish how it will fit a particular wrist.
#1 Best Overall
- Calendar-linked time difference adjustment function
- Movement Caliber 9S86,
- Dual-curved sapphire crystal
For bracelet circumference, the official regional pages do not agree. The Middle East page lists a maximum of 192 mm; the Japanese boutique listing gives 200 mm. Check the actual bracelet and sizing with the seller before purchase rather than treating either figure as universal.
What movement is in the Grand Seiko SBGH347?
The watch uses Grand Seiko caliber 9S85, an automatic mechanical movement that can also be wound manually. Grand Seiko lists 37 jewels and an approximate power reserve of 55 hours. “Hi-Beat 36000” identifies the model’s high-beat mechanical category; the cited product specifications do not provide further movement-performance comparisons with other watches.
Rank #2
- Three-fold clasp with push button release
- Dual-curved sapphire crystal
- Power reserve display on the back
- Power resrve Approx. 72 hours(3 days)
Accuracy figures and their context
Grand Seiko gives two accuracy figures. The mean daily rate is +5 to −3 seconds per day in the manufacturer’s controlled testing of the movement before it is cased. Its normal-use figure is +8 to −1 seconds per day. These are not guarantees that every watch will keep time within those bounds on every wearer’s wrist: the brand says actual performance can vary with wear time, temperature, arm movement, shocks and vibration. See the qualification on the official product page.
Water resistance and other practical specifications
Grand Seiko lists water resistance at 10 bar. The cited specification is a rating, not a description of the watch’s suitability for every activity or condition. The page also lists a dual-curved sapphire crystal, inner-surface anti-reflective coating, a see-through screw caseback and a 19 mm band width.
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Rank #3
- See-through case back
- Date display
- Screw-down crown
- 40mm Diameter
- Weight 178.0 g
How much does the SBGH347 cost?
| Market and source | Listed price | Timing and qualification |
|---|---|---|
| Japan, Grand Seiko Boutique Online | ¥946,000 including tax | Japanese suggested retail price; Grand Seiko’s September 2, 2024 announcement planned release for October 11, 2024. The boutique listing shows the same price. |
| Middle East, Grand Seiko product page | USD 6,900 | Regional official product-page listing. |
These are market-specific official prices, not a direct currency comparison. They do not establish a current street price, resale value, discount or availability in another country. Check the official page or authorized seller for the price and stock applicable to your market. Sources: Grand Seiko Boutique Online Japan, Grand Seiko’s September 2, 2024 Japanese announcement and the Grand Seiko Middle East product page.
Independent reader supportYour contribution helps us test, update, and keep practical guides available for everyone.Who should consider the SBGH347?
The SBGH347 is worth considering if you want an automatic mechanical watch with a landscape-inspired dial, a relatively compact case diameter and a high-beat movement. Before buying, weigh the 13.3 mm thickness alongside the 37 mm diameter, check whether the bracelet will size to your wrist, and confirm the price and availability in your market. The official specifications establish what Grand Seiko lists; they do not establish independent wear performance, long-term reliability, service costs or resale value.
Quick Recap
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- OPEN-APERTURE DIAL: this men's automatic watch features a black dial with 24-hour subdial and LumiBrite hands, with a retro watch feel inspired by the 1964 Crown Chronograph
- AUTOMATIC: these self-winding, automatic men's watches are powered by your movement, with a power reserve of 41 hours
- STAINLESS STEEL: features a durable stainless steel watch case, black bezel, and stainless steel watch band
- WATER-RESISTANT: these men's wrist watches are water-resistant down to 50 meters
- 4R39 CALIBER: equipped with the reliable caliber 4R39 automatic movement, this accurate men's watch keeps precise time
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- BURGUNDY DIAL: this men's automatic watch features a burgundy deep, pressed pattern with a gloss finish and rose gold stainless steel watch case
- AUTOMATIC: these self-winding, automatic men's watches are powered by your movement, with a power reserve of 41 hours
- STAINLESS STEEL & LEATHER: features a durable rose gold-finish stainless steel watch case paired with a brown leather watch band
- WATER-RESISTANT: these men's wrist watches are water-resistant down to 50 meters
- 4R35 CALIBER: equipped with the reliable caliber 4R35 automatic movement, this accurate men's watch keeps precise time
Product prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on Amazon at the time of purchase will apply.
