Casio to Release New G-SHOCK Featuring Analog Chronograph with Iconic Dial Indicator

New G-STEEL Watches with Connected Engine Module

July 11, 2017


Tokyo, July 11, 2017 — Casio Computer Co., Ltd., announced today the release of new additions to the G-STEEL series of watches that feature a layer guard structure combining different materials. The GST-B100 and GST-B100D watches feature analog chronographs with a large, distinctive dial indicator, as does the special edition GST-B100X model.

The GST-B100 and GST-B100D are the first watches in the G-STEEL series to feature analog chronographs. An iconic dial indicator at the nine o'clock position is designed in the bold image of the turbine blades on a jet aircraft engine. The dial indicator rotates to graphically indicate the elapsed stopwatch time, alarm on/off setting or battery level. The watches feature a high-power dual coil motor that drives the large dial indicators. The appealing rotation of the dial indicator and the multidimensional watch face make for a chronograph that is distinctively G-SHOCK.

The watches are equipped with the Connected Engine, which connects to Internet time servers via a smartphone, to keep accurate time anywhere in the world. The user can also set the alarms and world time city from a smartphone app. Other practical features including the original high-efficiency Casio Tough Solar power system, a high-luminosity LED light, and Dual Dial World Time.

The new watches feature an updated layer guard structure that combines metal and resins to absorb shock and is a signature feature of the G-STEEL Series. The shock-resistant resin parts have been incorporated into the case to make for a thinner case. High-density packaging technology has been used to reduce the size of the component modules, further enhancing the wearability of these watches.

The GST-B100X, special edition model, incorporates carbon materials in the bezel. Cutting-edge TORAYCA® carbon fiber and NANOALLOY® resin technology from Toray Industries, Inc. are combined to realize a material with excellent shock resistance and an appealing look that augments the bold bezel design. The face is made from scratch-resistant sapphire crystal with excellent clarity and readability, offering both durability and good looks.

These latest G-SHOCK watches deliver a unique use of materials and a distinctive rotating indicator while offering even greater universal value with their wearability and ability to tell accurate time anywhere in the world.

Stainless steel




Iconic dial indicator


Water Resistance
200 meters
Communication Specifications
Communication Standard
Bluetooth® Low Energy
Signal Range
Up to 2m (may differ depending on surrounding conditions)
Accuracy at Normal Temperature
±15 seconds per month
  • *1 If never updated by connecting to a smartphone
Watch Functions
Dual Time
Home city time swapping
1 second; measuring capacity: 23:59'59; measuring modes: elapsed time, split time
Countdown Timer
Measuring unit: 1 second (maximum 24 hours)
1 independent daily alarm
Other Features
Mobile Link functions (world time: over 300 cities, one-touch time adjustment, auto time adjustment [four times a day], daylight saving time auto switching, alarm setting, timer setting); full auto-calendar; battery level indicator; LED light (super illuminator and afterglow)
Power Source
Tough Solar power system (solar-charging system)
Continuous Operation
About 24 months with the power-saving function*2 ON after full charge
  • *2 Power-saving after a certain period in a dark location
Size of Case
58.1 × 53.8 × 14.1 mm
Total Weight
GST-B100D: 185g
GST-B100/GST-B100X: 101g
  • The Bluetooth® word mark and logos are registered trademarks owned by Bluetooth SIG, Inc. and any use of such marks by Casio Computer Co., Ltd. is under license.