Casio G-Shock GST-W100


About GST-W100 in Short. Representative of the first generation G-Shock G-Steel in a steel case. The protective structure of the body is due to the combination of steel and polyurethane – two materials of different density and other physical properties. In this model, the bezel is polyurethane, so that the watch remains both for sports and for everyday use. While reading information from the dial, you can activate the Hands Shift function – when the hands take neutral positions, so as not to interfere with reading data from electronic windows. The watch has a solar battery [charged from daylight]. The time is automatically corrected by radio waves from towers around the world. At night, the analogue and digital zones are illuminated by separate LEDs with automatic activation when the wrist is turned.

G-SHOCK G-STEEL Evolution Timeline

April, 2022

GST-B500

370$ on Amazon →
★★★★
The GST-B500 line brings together smaller components and high-density mounting, continuing to deliver Bluetooth connectivity and solar power charging.
More →

May, 2021

GST-B400

350$ on Amazon →
★★★★
An ultra-thin module encased in carbon fiber makes for a stylish G-STEEL timepiece with the slimmest profile yet.
More →

July, 2015

GST-W110

★★★★
First G-STEEL generation watch with Layer Guard Structure and Steel case.
More →

March, 2015

GST-W100

★★★★
First G-STEEL generation watch with Layer Guard Structure and Steel case.
More →

*See the full story here →


General Information

Price$260  *average Amazon Price, we may earn commission from purchases
Year of First Release2015
Model Range G-STEEL
Battery Type Solar (Casio Batteries)
Manual5445 (official)

GST-W100 Model Range *may be updated

*Want to be the first to know about new G-Shock Updates? Here we store all recent Monthly G-Shock Updates →


The most distinctive specs of GST-W100 *Editorial
200-meter water resistance (good for swimming but not for deep diving)
Tough Solar (CASIO’s original solar-charging system converts not only sunlight but also light from fluorescent lamps and other sources into power)
Radio-controlled Watch; Multi band 6 (additional way for time sync. This watch receives time calibration radio signals that keep the displayed time accurate)
Layer Guard Structure (boasts a double-layer bezel construction of stainless steel and resin or resin and fine resin which delivers the hard, sleek beauty of metal while retaining the impact absorption of resin.)


Other G-Shock GST Watches *similar by price and functions but different by cases

These are not all G-Shock GST Series. Here is a list of All G-Shock GST Watches →


Official GST-W100 Video


Official Casio Description. From G-SHOCK, the watch brand that is constantly setting new standards for timekeeping toughness, comes G-STEEL, a watch series with a new “layer guard structure”.
Different materials are used for the bezel to create a two-layer structure that adds a new dimension of shock resistant. For models that use stainless steel in the upper part, shock absorbing resin is employed in the lower part. If resin is used in the upper part, fine resin is used in the lower part to cushion against impact from the upper part. This also has made it possible create a wide range of different designs.


Casio GST-W100 on the wrist!


Official GST-W100 Specs / Features *for base version GST-W100D-1A4

  • Case / bezel material: Stainless steel / Resin
  • Case / bezel material: Resin / Stainless steel
  • One-touch 3-fold Clasp
  • Stainless Steel Band
  • Mineral Glass
  • Neobrite
  • Shock Resistant
  • 200-meter water resistance
  • Double LED light
    LED light for the face (Full auto LED light, Super illuminator, selectable illumination duration (1.5 seconds or 3 seconds), afterglow)
    LED backlight for the digital display (Full auto LED light, Super illuminator, selectable illumination duration (1.5 seconds or 3 seconds), afterglow)
  • Tough Solar (Solar powered)
  • World time
    31 time zones (48 cities + coordinated universal time), daylight saving on/off, Home city/World time city swapping
  • 1/100-second stopwatch
    Measuring capacity: 59’59.99”
    Measuring modes: Elapsed time, split time, 1st-2nd place times
  • Countdown timer
    Measuring unit: 1 second
    Countdown range: 100 minutes
    Countdown start time setting range: 1 second to 100 minutes (1-second increments, 1-minute increments)
  • 5 daily alarms
  • Hourly time signal
  • Hand shift feature (Hands move out of the way to provide an unobstructed view of digital display contents.)
  • Battery level indicator
  • Power Saving (display goes blank to save power when the watch is left in the dark)
  • Full auto-calendar (to year 2099)
  • 12/24-hour format
  • Button operation tone on/off
  • Regular timekeeping
    Analog: 2 hands (hour, minute)
    Digital: Hour, minute, second, pm, month, date, day
  • Accuracy: ±15 seconds per month
  • Approx. battery operating time:
    8 months on rechargeable battery (operation period with normal use without exposure to light after charge)
    19 months on rechargeable battery (operation period when stored in total darkness with the power save function on after full charge)
  • Size of case : 59.1×52.4×16.1mm
  • Total weight : 184g

Recent News about GST-W100 

All Casio GST-W100 News →


You ask, we answer…

What does 200-meter water resistance in GST-W100 mean?

The watch is good for swimming but not for deep diving.

What type of battery does GST-W100 have?

Solar.

Does GST-W100 have alarm?

Yes, it has 5 daily alarms.


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