Grand Seiko Sport automatic Hi-Beat 36000 titanium black dial steel bracelet 44 mm

A recreational diving watch

Thanks to its experience in the design of diving watches, the Japanese Manufacture presents us with a watch that perfectly meets the strict ISO standards, while respecting the typical codes of a Grand Seiko watch. Reliable, precise, durable and easy to use, this SBGH289 offers everything a diver needs.

A true tool-watch, there is no room for superfluous features. Indeed, the watch focuses on legibility, with a blue matte dial with a refined design to limit reflections and facilitate reading. Still with this objective of legibility, two different shapes of hands and oversized applied indexes are present to read the time at a glance. Large quantities of Lumibrite, a luminescent material exclusive to the brand, are applied to these different elements, in order to provide a very strong contrast with the dial and thus provide maximum visibility. A date is present at three o'clock.

This reference has a 43.8 mm case and a 316L stainless steel bracelet. With a Dia-Shield treatment, the case-bracelet set will guarantee you an important resistance to scratches and corrosion. As with all Grand Seiko watches, an enormous amount of finishing work has been done on the case and bracelet, with alternating brushed and polished areas, the House's signature. A glossy black unidirectional bezel and a slightly domed sapphire crystal with anti-reflective treatment crown the whole.
The bracelet has an ingenious diving extension system at the level of its buckle, in order to quickly adjust the size of the strap. The whole weighs 206 grams on the scale.
Finally, this watch guarantees a water resistance of 200 meters thanks to its screwed crown.

Mechanical side

Grand Seiko has chosen to equip its diving watch with a Hi-Beat 36 000 vibrations 9S85 manufacture calibre. This choice is not insignificant, because such a frequency allows an extreme precision. With this very high frequency, the seconds hand turns with exemplary fluidity.
The movement offers a comfortable power reserve of 55 hours (a real feat for a mechanism requiring a lot of energy), and uses 37 jewels. This calibre, which is designed, manufactured, assembled, adjusted and tested at the Shizuku-Ishi Watch Studio, has chronometry standards that exceed the COSC, with an average accuracy of -3 to +5 seconds per day.
Unfortunately, the movement is not visible, as the watch has a solid case back to ensure perfect water resistance.