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CaseStainless steel
Case back: Stainless steel and sapphire crystal
GlassDual-curved sapphire crystal
CoatingAnti-reflection coating on inner surface
Case sizeHeight 46.2 mm x Diameter 40.0 mm × Thickness 14.0 mm
The perimeter of bracelet200.0 mm
BandStainless steel


Movement Caliber 9S86    Instructions
Driving systemMechanical automatic with manual winding
Power reserveApproximately 55 hours
Accuracy+5 to -3 seconds per day (when static)
Note: This accuracy is the result of measuring the loss/gain of the time for seventeen days before the inside movements of the watch are put in the case. The measurement has been done in the factory where temperatures or position of the movements are controlled. When the watch is actually worn, the accuracy should be from -1 second/day to +10 seconds/day (-1 second/day to +8 seconds/day for Cal.9S85, 9S86).


ClaspThree-fold clasp with push button release
Water resistance10 bar
Magnetic resistance4800 A/m (60 gauss)
RemarksGMT hand
Screw down crown
See-through back
Screw back
Jewels: 37
Tri-fold push button release clasp
Caseback with lion emblem
24 hour hand (dual time display function)
Stop second hand function
Quick correction function of time difference adjusting to a calendar


About Grand Seiko SBGJ231

Grand Seiko Mechanical Hi-Beat 36000 GMT Seiko Premium Boutique Exclusive Special Edition

It is a model equipped with a caliber 9S86 which added the GMT function, while maintaining the performance of automatic winding mechanical high beat 36000 movement which strongly resists disturbance and high precision of showing the time.

With the 24-hour scale marked on the dial and the GMT needle you can display the time of another region with different time zones.
The exterior design born by contemporary interpretation of “shining bright watch” defined by the original design philosophy “Seiko Style” that is established by “44 GS” and launched in 1967, it has a surface with no distortion and frequently used as a mirror finishing.

The blue dial color is adopting the “Iwateyama pattern” expressing the magnificent sky of Mount Iwate. From the Shizukuishi luxury watch factory which is responsible for the mechanical watch of Grand Seiko, the scenery of Fuyuyama is emerging a hint of snow with a reflecting moonlight.

Grand Seiko SBGJ231 Features : 

  • 37 jewels
  • GMT hand
  • Screw down crown
  • See-through back
  • Screw back
  • Tri-fold push button release clasp
  • Caseback with lion emblem
  • 24 hour hand (dual time display function)
  • Stop second hand function
  • Quick correction function of time difference adjusting to a calendar

Grand Seiko SBGJ231 History : 

Prior to 1960, to challenge the status of Swiss watches and change the perception of Japanese watches, Daini Seikosha and Suwa began the discussion of a product line that can match the quality of Swiss watches under the suggestion of the parent company. At the time, Suwa Seikosha Co. was in charge of manufacturing men’s watches, so it was decided that Suwa would be producing the first Grand Seiko (GS).

The first Grand Seiko was released in 1960, it was based on Seiko’s previous high-end watch, CROWN. This Grand Seiko has a 25-jewel, manual-winding, 3180 caliber, and only 36,000 units were produced. This was also the first chronometer-grade watch manufactured in Japan, and it was based on Seiko’s own chronometer standard.

Design style

The design language of the Grand Seiko was set in 1967, with the creation of Grand Seiko 44GS. The 44GS set the ground for all future Grand Seiko with nine elements. These elements help improve the legibility of the watch under different situations, and create a sharp, crisp visual impression:

  1. Double width index at 12 o’clock
  2. Multi-faceted rectangular markers
  3. Highly polished bezel
  4. Highly polished planes and two-dimensional surface
  5. Half recessed crown
  6. Flat dial
  7. Multi-faceted hour and minute hands
  8. Curved side line
  9. Reverse slanted bezel wall and case side
  10. Dress style with simple but beautiful design
  11. Zaratsu polishing

source : wikipedia

Additional information

Weight2 kg
Dimensions5 × 4 × 2 cm

Service Center

Center NameAddressTelFax
Seiko Service Center JakartaJalan Melawai IX No. 46, Blok M, Jakarta Selatan, Indonesia+62-21-7208717+62-21-7201249
Seiko Service Center JakartaPlaza Senayan Lt 3 No. 353-A, Jakarta Pusat, Indonesia+62-21-5725689


Seiko Service Center JakartaLt Dasar No. 115-116, Gd. Harco Pasar Baru, Jakarta Pusat, Indonesia+62-21-3452335
Seiko Service Center SurabayaJalan Tunjungan No. 98-100, Surabaya, Indonesia+62-31-5474756


Seiko Service Center SurabayaPlaza Surabaya, Lt 1 No. 56-57, Surabaya, Indonesia+62-31-5316199
Seiko Service Center MedanJalan Cirebon No. 16, Medan, Indonesia+62-61-4149636
Seiko Service Center MedanSun Plaza Level 1, Blok C-32, Medan, Indonesia+62-61-4501505

Water Resistance

Water Resistant Chart


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