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What is the Grand Seiko SBGJ277 Sekkei?
Reference SBGJ277 belongs to Grand Seiko’s Sport Collection. Its white textured dial and green rotating bezel are intended to suggest a snowy mountain valley in summer. The color pairing gives the watch a distinctive look, while the bezel and 24-hour hand serve a practical GMT role.
Grand Seiko describes the watch as housing its mechanical Hi-Beat 36000 GMT Caliber 9S86, which “runs at ten beats per second while offering excellent rate stability and resistance to outside interference.” That description is the brand’s characterization; the phrase “excellent rate stability” is not an independent measurement.
What does “Sekkei” mean?
“Sekkei” is Grand Seiko’s name for the snowy-valley design concept behind the dial and bezel. It describes the visual inspiration: snow remaining in a mountain valley while green growth signals summer. It is not a movement specification or a separate GMT mode.
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- Three-fold clasp with push button release
- Dual-curved sapphire crystal
- Power reserve display on the back
- Power resrve Approx. 72 hours(3 days)
How big is the SBGJ277?
The stainless-steel case measures 44.2 mm in diameter, 50.6 mm lug-to-lug and 14.4 mm thick; the listed band width is 21 mm. The watch weighs 188 g. Those dimensions and weight indicate a substantial watch on paper, but they do not establish how it will fit an individual wrist.
How does the SBGJ277 GMT work?
The watch combines a 24-hour hand with a rotating 24-hour bezel for dual-time use. Grand Seiko says the arrangement can be used to check up to three time zones and includes calendar-linked time-difference adjustment. The official specification identifies those functions but does not provide a step-by-step setting procedure on the model page.
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- 24-hour hand (dual time display function)
- Power Reserve Approx. 55 hours
- See-through case back
What movement and accuracy does Grand Seiko specify?
The SBGJ277 uses caliber 9S86, an automatic movement that can also be wound manually. Grand Seiko lists an approximately 55-hour power reserve and a normal-usage accuracy range of +8 to -1 seconds per day. This is the manufacturer’s stated normal-use figure, not a guarantee that every individual watch will keep time within that range in every wearer’s conditions.
Grand Seiko separately gives a mean daily rate of +5 to -3 seconds per day. It defines this as a pre-casing test conducted at six positions under artificially controlled conditions over 12 days. That controlled figure should not be confused with the normal-usage accuracy range.
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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
For historical movement context, Seiko Watch Corporation’s September 7, 2016 announcement described caliber 9S86 in earlier Hi-Beat GMT models as running at 36,000 vibrations per hour, or 10 beats per second, with 37 jewels, a 55-hour reserve and static accuracy of +5 to -3 seconds per day. Those are specifications from the earlier announcement, not a separate test of this SBGJ277.
Case, crystal and resistance specifications
Grand Seiko lists a stainless-steel case with a screw case back, a dual-curved sapphire crystal with anti-reflective coating on its inner surface, a screw-down crown, 20 bar water resistance and magnetic resistance of 4,800 A/m. These are the manufacturer’s construction and resistance ratings; they do not by themselves establish suitability for a particular activity.
Rank #4
- STUNNING BLUE DIAL: this automatic men's watch features a deep blue, pressed pattern and gloss finish surrounded by a 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: features a durable stainless steel watch case and bracelet with see through caseback
- 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
SBGJ277 specifications
| Specification | Grand Seiko listing |
|---|---|
| Reference and collection | SBGJ277; Sport Collection |
| Movement | Caliber 9S86; automatic with manual winding |
| Power reserve | Approximately 55 hours |
| Normal-usage accuracy | +8 to -1 seconds per day |
| Mean daily rate | +5 to -3 seconds per day; pre-casing, six positions, artificially controlled conditions over 12 days |
| Case material and back | Stainless steel; screw case back |
| Crystal | Dual-curved sapphire; anti-reflective coating on inner surface |
| Dimensions | 44.2 mm diameter; 50.6 mm lug-to-lug; 14.4 mm thick |
| Band width | 21 mm |
| Weight | 188 g |
| GMT functions | Rotating 24-hour bezel; 24-hour hand/dual-time display; calendar-linked time-difference adjustment |
| Water resistance | 20 bar |
| Magnetic resistance | 4,800 A/m |
US listed price
Grand Seiko’s US SBGJ277 page listed the watch at USD 7,600.00 when checked on October 5, 2026. That is the page’s US listed price on that date; taxes, availability and retailer terms can vary.
Quick Recap
Best Value
- 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
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.
