Grand Seiko Sport CollectionCaliber 9F86 Quartz GMT


Today sees the release of the first ever Grand Seiko 9F quartz GMT caliber. It is the perfect caliber for the international traveler. Caliber 9F86 is based upon, and has all the precision and durability attributes of, the original 9F but incorporates a GMT function that allows the watch’s precision to be maintained when the hour hand is adjusted independently. This is made possible by new components that have been created especially for this movement.
Caliber 9F86 is presented in one limited edition and two other permanent creations in the Grand Seiko Sport Collection.


In addition to the limited edition, two other new creations are to be released incorporating the 9F86 caliber. They add a new dimension to the Grand Seiko Sport Collection and share the simple but powerful design that characterizes it.

The dials are three dimensional in appearance and are edged with a two-tone ring to allow the AM or PM time indicated by the GMT hand to be read instantly and easily. Similarly, the use of Lumibrite on the hour markers and hour, minute and seconds hands delivers the enhanced legibility that the international traveler needs.

LIMITEDA limited edition with enhanced accuracy to celebrate
the 25th anniversary of Caliber 9F

The metallic charcoal dial features a unique pattern based on Grand Seiko’s traditional ‘Quartz’ symbol to commemorate the 25thanniversary of Caliber 9F.
The outer rim of the dial, from three o’clock to nine, is picked out in vivid yellow to display at a glance whether the GMT hand indicates AM or PM.

It also carries the five-pointed star that has always symbolized Grand Seiko’s ‘Special’ level accuracy and, at the 25 minute position, the dial pattern is subtly different; the symbols 9F and 25 are discreetly shown as a permanent reminder of the caliber’s anniversary.

Above the six o’clock marker, the 5-pointed star symbolizes the extraordinary precision rate of ±5 seconds a year.

The stainless steel case back is adorned with the Grand Seiko lion emblem.
Each watch also bears a unique serial number engraved onto the back.

* In an actual product, the case back direction might be different from the photograph.

MOVEMENTThe specially adjusted movement

The limited edition incorporates a movement with specially enhanced precision rate; +/- 5 seconds a year, commemorating the 25th anniversary of the Grand Seiko 9Fcaliber.

A quartz movement crafted by hand

While the majority of the world's quartz movements are products of automatic assembly, Grand Seiko's 9F quartz movement, with its variety of complex functions, is assembled entirely by hand. Two expert craftsmen combine their individual talents to preserve the high quality standard of Grand Seiko – with one assembling and date indicator and the other in charge of the movement.

Caliber 9F

In 1993, Caliber 9F83, the first 9F caliber, was released. It delivered advances in every aspect. Its hands were as long as those on every other Grand Seiko watch, the calendar change was instantaneous and the durability and reliability was enhanced. Caliber 9F incorporated key innovations such as a backlash auto-adjust mechanism to eliminate any shuddering of the second hand, a twin pulse control system to deliver increased torque and a special construction to minimize the risk of dust coming into contact with the gear train and stepping motor. No effort was spared and, still today, Caliber 9F can lay a strong claim to being the highest performance quartz watch in the world.

Limited edition of 800

Celebrating the 25th anniversary of the Grand Seiko 9F quartz caliber
Caliber 9F 25th Anniversary Limited Edition


[ Caliber 9F86 (special adjustment accuracy: ±5 seconds per year) ]


Grand Seiko Sport Collection


[ Caliber 9F86 ]


Grand Seiko Sport Collection


[ Caliber 9F86 ]