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Case Stainless steel
Case back: Stainless steel and sapphire crystal
Glass High definition dual-curved sapphire crystal
Coating Anti-reflection coating on inner surface
Case size Diameter 40.0mm×Thickness 14.0mm
The perimeter of bracelet 195.0mm
Band Stainless steel


Movement Caliber 9S86    Instructions
Driving system Automatic
Power reserve Approximately 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).


Clasp Three-fold clasp with push button release
Water resistance 10 bar
Magnetic resistance 4800 A/m (60 gauss)
Weight 159.0 g
Remarks GMT hand
Screw down crown
See-through back
Screw back
Jewels: 37
Tri-fold push button release clasp
Quick correction function of time difference adjusting to a calendar



Grand Seiko SBGJ003G Mechanical Hi-Beat 36000 GMT Collection

Seiko Watch Corporation is pleased to announce its first ever Hi Beat GMT. It has all the features of the existing caliber, with the addition of a 24 hour GMT hand with easy hour adjustment. Every Grand Seiko watch showcases the pure essentials of watchmaking, with craftsmanship and high technology manufacturing being harmonised to create watches that are as accurate, as legible, as comfortable and as durable as can be achieved.

This HI-Beat GMT movement, the caliber 9S86 watch is an automatic winding type (with manual winding function). The mainspring can be sufficiently wound automatically by natural movement of the arm while normally worn on the wrist. In addition, it can be wound by turning the crown. It is recommended that you wear the watch on your wrist more than 10 hours a day to keep the mainspring wound up.