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GST-B100 Series


My GShock

A G-STEEL model equipped with an analog chronograph and a pure stainless steel band designed with a motif of heavy jet engine blades. A dual-coil motor in a rotating disc dial placed at 9 o'clock moves the dial blades and exudes a functional beauty. In addition to the alarm on/off function and using the rotation to show the stopwatch, etc., it also functions as a battery indicator, The layer guard structure and high-density mounting technology have allowed the module to be smaller and thinner, improving wearability and overall watch quality. It is also equipped with Bluetooth® connectivity that enables accurate time acquisition via your smartphone. Its Tough Solar feature allows it to run stably, and it is also equipped with practical functions such as high-brightness LEDs and dual-dial world time.




Carbon Bezel

Carbon Bezel

The carbon composite bezel is constructed of resin amalgamated with a lightweight, highly rigid TORAYCA®*1 carbon-fiber material developed by applying NANOALLOY® technology.*2 After layers of unidirectional fibers are alternately stacked in the vertical and horizontal directions and bonded together, the resulting laminated material is cut into the form of a bezel. It is then finished in a pyramid-shaped design inspired by an metal file.

[compatible model:GST-B100X-1A]

Rotary Disc

Rotary Disc

A rotary disc inspired by jet engine blades is mounted at 9 o'clock. The battery level and remaining time on the timer are indicated by a red marker that is visible through the clearance of the blades.

Layer Guard Structure

Layer Guard Structure

The bezel structure combines two layers, a metal layer and a resin layer. Six front screws attach it firmly to the forged stainless-steel case, adding a tough finish to the powerful exterior.

Tough Solar

Tough Solar

Tough Solar converts sunlight or artificial light to ample power to assure stable operation of multiple functions. The system supports a solar-powered Smartphone Link function with a heavy load capability.

*1 TORAYCA®: High-performance carbon fiber material by Toray Industries is used in a wide range of applications, including: aerospace, high-pressure vessels, wind power generation, automobiles, bicycles, golf club shafts, fishing rods, and more.

*2 NANOALLOY®: Original Toray Industries nanometer structure control technology makes it possible to combine multiple polymers on a nano-metric scale (one billionth of a meter) for performance that is far superior to previous types of materials. This polymeric material enables high performance and high function that was previously not possible with standard micron order (one millionth of a meter) alloys.

G-SHOCK Connected

G-SHOCK Connected FREE

Smartphone App

The exact time is set automatically by smartphone four times a day. The time in any of 300 cities worldwide can also be displayed promptly with a simple operation on a special smartphone application.

Automatic time correction

The watch is connected to an Internet-based time server automatically and the time corrected four times a day. When crossing between time zones, it switches to local time immediately with the touch of a button.

Data updating system

Regulations governing time around the world, including changes in time zones and Daylight Saving Time starting/ending dates of are entered into the watch’s internal data via the app. The correct time is always displayed based on the latest time information.

300-city World Time

The time in any city selected from a world map or city list is displayed in an inset dial on the watch face with a simple touch of the smartphone screen.

Home Time / World Time display switching

Just the touch of a button on the app switches the times displayed on the main dial and inset dial. This function comes in handy when traveling internationally, for example.

Battery level indicator

The battery charge level can be checked on the app. Wearing or storing the watch in an environment that enables solar recharging helps to keep the battery charged.

Phone Finder

Operating a button on the watch sounds an alert on a misplaced smartphone.
Even when set to the silent mode, the phone sounds out clearly to announce its location.

* App screens shown here may differ from actual screens, 
since the app is currently under development.

Supported Phone Models (As of August 2017)

iOS: iOS 10 or later
Android: Android 6.0 or later

* Bluetooth installed smartphone only.

* The Bluetooth® wordmark and logo are registered trademarks of Bluetooth SIG, Inc. and any use of these marks by Casio Computer Co., Ltd. is under license.
* Apple, Apple logo and iPhone are trademark of Apple Inc. registered in the United States and other countries. App Store is a service mark of Apple Inc.
* IOS is a trademark or registered trademark of Cisco Systems, Inc. registered in the U.S.
* Google Play and the Google Play logo are trademarks of Google Inc.
* All other company and product names are trademarks or registered trademarks of their respective owners.
List of Countries and Geographic Areas where Product Conforms to Radio Laws or Has Been Approved.


*The color tone of the listed products may differ from the actual product in some cases.

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