Grand Seiko Sport 'Slate' Quartz GMT SBGN027

This sports timepiece demonstrates the essential qualities of Grand Seiko: accuracy, beauty, legibility, durability and ease of use.

The case is a classic slim design for a comfortable fit, its surface features a finely brushed hairline finish – a skill perfected by Grand Seiko craftspeople – contrasting the signature Zaratsu mirrored polishing.

This watch is powered by the in-house 9F86 Quartz calibre adjusted to an accuracy of -/+ 10 seconds per year.

Every quartz crystal has different performance characteristics, but only the most accurate are picked for Grand Seiko 9F movements. Grown in-house, aged and rigorously tested over a 3 month period, this ensures only the best quartz oscillators are crafted into each timepiece.

Calibre 9F delivers long-lasting high performance through innovation: the instant Date Change Mechanism swiftly changes the date display; the torque is comparable to a mechanical movement allowing easy-to-read wider and longer hands; the Second hand precision achieves positional accuracy on the dial against the markers; and the sealed structure means high retention of lubricating oils.

The screw-lock crown means the watch maintains excellent airtightness with a 20 bar water-resistance, as well as durability. Its powerful hands and grooved, prominent markers with LumiBrite ensure high legibility, whilst the contrast created by the upper and lower two-toned dial rings indicates if the GMT hand time is day or night.

Grand Seiko: beautifully precise Japanese watchmaking, handcrafted by Takumi artisans.