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GRAND SEIKO ‘Slate’ Quartz GMT

Code: SBGN027
  • £2,460.00 (ex. VAT)
  • (Delivery from £50.00 (ex. VAT) )
Item in Stock   |   Usually dispatched within 24 hours

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.

  • Refunds can be requested within 14 days of the date of despatch, and exchanged within 30 days from the date of despatch. If you choose to exchange your item outside of the 14 day refund policy, a refund will not be offered for the exchanged item unless the product is faulty.
  • Unfortunately we cannot accept returns of earrings or cleaning products if the tamper proof packaging has been opened. This is for hygiene reasons and doesn't affect your statutory rights. We cannot accept items that have been engraved, personalised or altered.
  • Our promise to replace the item or refund your money does not apply to faults or damages caused by accident, neglect or misuse.
  • Except in relation to faulty or incorrectly supplied goods, where your statutory rights are unaffected, personalised goods made to a customer's specifications may not be returned. When your item is a special ordered large item, we do not keep stock of this item and we will raise an order through a supplier direct to you. In such cases you may not be able to return your goods if they are unwanted, however if you experience problems with your goods or order then please contact the Antonio Group customer experience team.
  • Please Note: When processing your return we may need to speak with you before we are able to complete the process. If we are unable to make contact with you within 14 days of receiving your item(s), we will return it to the delivery address linked to the order.