G7900-1 Casio G-Shock Watch

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GSTB100D-1A G-Steel Casio G-Shock Watch



GSTB100D-1A G-Steel Casio G-Shock Watch

G-SHOCK offers the first G-STEEL lineup models featuring chronograph performance in analog format. The dial at 9 o’clock has a multi-functional rotating disk that is cut to resemble the thick blades of a jet engine. These watches are equipped with Bluetooth® that lets them connect with a smartphone at the press of a button, and acquire time information from an internet time server. The result is accurate timekeeping no matter where in the world you happen to be. Other functions include Tough Solar in combination with CASIO original power

  • Forged Parts

  • Solar Powered

  • Layer Guard Structure

G-Shock - Toughest Watches featuring Atomic Timekeeping and Tough Solar Technology


GSTB100D-1A G-Steel Casio G-Shock Watch

  • Shock resistant

  • 200m water resistant

  • Solar powered

  • LED light (Super Illuminator)

  • Afterglow

  • Mobile link (Wireless linking using Bluetooth®)

  • Dual time (Home city time swapping)

  • 1-second stopwatch

  • Measuring capacity: 23:59'59

  • Measuring mode: split time

  • Countdown timer

  • Measuring unit: 1 second

  • Countdown range: 24 hours

    • Countdown start time setting range: 1 minute to 24 hours (1-minute increments and 1-hour increments)

  • Daily alarm

  • Battery level indicator

  • Power Saving (hands stop to save power when the watch is left in the dark)

  • Full auto-calendar (to year 2099)

  • Date display

  • Day indicator

  • Regular timekeeping

    • Analog: 3 hands (hour, minute (hand moves every 10 seconds), second), 3 dials (dual time hour and minute, dual time 24-hour, day)

  • Accuracy: ±15 seconds per month (with no mobile link function)

  • Approx. battery operating time:

    • 5 months on rechargeable battery (operation period with normal use without exposure to light after charge)

    • 24 months on rechargeable battery (operation period when stored in total darkness with the power save function on after full charge)

  • module 5513

  • Size of case / total weight

  • GST-B100D 58.1 x 53.8 x 14.1 mm / 185 g

  • GST-B100 58.1 x 53.8 x 14.1 mm / 101 g


GSTB100D-1A G-Steel Casio G-Shock Watch

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Casio Timepiece warranty


This product, except consumables or articles with limited resistance (e.g. battery, band, case), is warranted to the original purchaser to be free from defects of quality at the time of delivery for a period of one year from the date of purchase ("warranty period"). During the warranty period, and upon proof of purchase, the product will be repaired using CASIO reconditioned replacement parts or the product will be replaced with the same or a similar reconditioned replacement model within a reasonable period of time. To obtain these warranty services, please take or send the product, postage paid, with a copy of your sales receipt or other proof of purchase that shows the date of purchase, to a CASIO Service Center such as TQ Diamonds. There will be no parts or labor charge to you for valid warranty services.

This warranty is void if your watch was purchased from an online auction site or has been damaged by unauthorized service, negligence or accident, or other causes not relating to defective material or workmanship.

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Don't risk losing your warranty buying a watch from an online auction site that can't offer a valid warranty! TQ Diamonds is your #1 authorized dealer.

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