• Casio G-Shock GSTB100B-1A4 G-STEEL black dial with orange accents front view
  • Casio G-Shock GSTB100B-1A4 G-STEEL side profile showing pushers
  • Casio G-Shock GSTB100B-1A4 G-STEEL stainless steel case back and resin strap

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Official Factory Warranty Included

G-Shock

Casio G-Shock GSTB100B-1A4 G-STEEL All Black with Orange Accents

$420.00

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Casio G-Shock GSTB100B-1A4 G-STEEL All Black with Orange Accents

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OFFICIAL AUTHORIZED DEALER
NO HASSLE REFUNDS OR EXCHANGES
FULL MANUFACTURER'S WARRANTY
FREE SHIPPING ON ORDERS OVER $75

The Casio G-Shock GSTB100B-1A4 G-STEEL pairs a Layer Guard case with an all-black finish and vivid orange accents, powered by Tough Solar and linked to your phone via Bluetooth Mobile Link.

Casio G-Shock GSTB100B-1A4 G-STEEL: Bluetooth Solar Chronograph

The Casio G-Shock GSTB100B-1A4 is a large analog G-STEEL chronograph built around Casio’s Layer Guard Structure, which pairs a fine-resin case core with a black ion-plated stainless steel forged bezel for shock absorption without the visual bulk of a full-metal build. Measuring 58.1 x 53.8 x 14.1 mm and weighing roughly 101 grams, it wears like a full-sized G-Shock while keeping the refined G-STEEL silhouette.

All-Black Dial with Signature Orange Accents

The stealth black dial is brought to life by the iconic rotating disc indicator at 9 o’clock, finished in bright orange and inspired by a jet-engine turbine. A matching orange CONNECT button at 8 o’clock and orange highlights on the hands and markers trace the watch’s high-tech purpose without breaking the all-black theme.

Tough Solar and Bluetooth Mobile Link

Tough Solar technology recharges the watch from any light source, delivering about five months of operation on a full charge and up to 24 months in the power-saving sleep state. Bluetooth Mobile Link pairs the GSTB100B-1A4 with the G-Shock Connected app for automatic time adjustment across 300+ cities, phone finder, world time, and easy alarm and timer setup from your phone.

Chronograph, Dual Time, and Daily Tools

Functions include a 1-second stopwatch up to 24 hours, a countdown timer, dual time with home-city swap, a daily alarm, a full auto-calendar to 2099, a battery level indicator, and a Super Illuminator LED light for low-light legibility. The mineral glass crystal and screw-lock crown round out a package rated for 200-meter water resistance and G-Shock’s signature shock resistance.

At a Glance

  • Case: 58.1 x 53.8 x 14.1 mm fine resin core with black IP stainless steel forged bezel
  • Band: Black resin with G-Shock embossed keeper
  • Movement: Tough Solar analog with Bluetooth Mobile Link (Module 5513)
  • Crystal: Mineral glass
  • Water resistance: 200 meters
  • Features: Chronograph, countdown timer, dual time, daily alarm, LED light, world time via app
  • UPC: 889232252926
  • case color: Black
  • case material: Resin
  • case shape: Round
  • color: Black
  • movement: Solar
  • case size (width): 54mm
  • strap material: Resin
  • strap color: Black
  • water resistance: 200m

G-Shock, short for Gravitational Shock, first launched in 1983 after Casio engineer, Kikuo Ibe conceptualized a watch that could have a battery life of 10 years, be water resistance up to 100 meters, and survive a 10 meters drop.  Originally intended as a high-priced specialty item, G-Shocks are now considered to highly regarded collector-worthy timepieces.

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