The Grand Seiko SBGH289 and SBGH291 are 2021 Sport Collection divers with the same Hi-Beat 36000 movement, 200 m water-resistance rating and case dimensions. The main differences are their materials, dial colors and listed weights: the SBGH289 pairs stainless steel with a blue dial and weighs 206 g; the SBGH291 uses high-intensity titanium, a black dial and weighs 142 g, according to Grand Seiko.
What is the difference between the SBGH289 and SBGH291?
Grand Seiko introduced both watches as additions to its Sport Collection. The SBGH289 is the stainless-steel, blue-dial version; the SBGH291 has a high-intensity-titanium case and black dial. Their core published specifications are otherwise shared.
| Specification | SBGH289 | SBGH291 |
|---|---|---|
| Case material | Stainless steel | High-intensity titanium |
| Dial | Blue | Black |
| Diameter / lug-to-lug / thickness | 43.8 mm / 51.0 mm / 14.7 mm | 43.8 mm / 51.0 mm / 14.7 mm |
| Listed weight | 206 g | 142 g |
| Band width | 22 mm | 22 mm |
| Movement | Automatic with manual winding, caliber 9S85 | Automatic with manual winding, caliber 9S85 |
| Approximate power reserve | 55 hours | 55 hours |
| Mean daily rate | +5 to −3 seconds per day | +5 to −3 seconds per day |
| Normal-use accuracy | +8 to −1 seconds per day | +8 to −1 seconds per day |
| Diver’s water resistance | 200 m / 660 ft | 200 m / 660 ft |
Specifications are from Grand Seiko’s SBGH289 product page and SBGH291 product page. Dial colors and launch context are described in Grand Seiko GS9 Club’s September 2021 UK model story.
How do the cases and weights compare?
The SBGH289 is the heavier option by the manufacturer’s listed figures: 206 g versus 142 g for the SBGH291. Both share a 43.8 mm diameter, 51.0 mm lug-to-lug length and 14.7 mm thickness, so the published dimensions do not distinguish them. Weight alone does not establish how either watch will feel on a particular wrist; the sources do not provide a wearing comparison.
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For a choice between the two, the concrete distinctions are therefore steel and blue on the SBGH289 versus high-intensity titanium and black on the SBGH291, along with their listed weight difference. Which material and appearance suit you is a matter of preference.
What movement and performance figures does Grand Seiko list?
Both watches use caliber 9S85, an automatic movement that can also be wound manually. Grand Seiko lists an approximate 55-hour power reserve. Its stated mean daily rate is +5 to −3 seconds per day, while the separate normal-use accuracy figure is +8 to −1 seconds per day. These are manufacturer specifications, not measurements from an individual watch or independent test.
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What features are specified for diving?
Grand Seiko specifies both models for 200 m / 660 ft diver’s water resistance. The brand also lists screw-down crowns and one-way rotating bezels. LumiBrite is applied to the hands, indexes and bezel, and the watches have sapphire crystals with an anti-reflective coating on the inner surface. Their screw case backs and three-fold clasps include secure locks, according to the product pages.
Grand Seiko describes the bezel as a four-part construction designed to facilitate disassembly and reassembly at its service centers. It also says the case, stem pipe and crown are designed for secure servicing. Those are manufacturer descriptions of serviceability; they do not establish a service interval or maintenance cost.
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When did the SBGH289 and SBGH291 come out?
Grand Seiko GS9 Club’s September 8, 2021 UK story said the watches would be available at Grand Seiko boutiques and select retailers worldwide in October 2021. A September 9 GS9 Club story also presented them as Sport Collection additions with October availability. These are launch-era availability statements, not confirmation of current stock in any market.
For current regional pricing, availability or resale value, check a local authorized retailer or current listings for the exact reference. The cited product pages and launch stories do not establish present-day prices or stock. They also do not provide independent long-term ownership evidence, measured accuracy for a particular example, or in-water test results.
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