Casio G-Shock G-Steel GST-B100-1AJF Japan Import

Items Description

The Casio G-Shock G-Steel GST-B100-1AJF Japan Import is a solar-assisted analog-digital chronograph designed for users who want G-Shock shock resistance housed in a forged stainless-steel case with Bluetooth smartphone linking. Positioned within the G-STEEL line, this Japan-market reference pairs a black dial and resin-banded metal construction with the Tough Solar charging system and G-SHOCK Connected app support.

 

The GST-B100-1AJF measures 58.1 x 53.8 x 14.1 mm and carries 200-meter water resistance, with the bezel built from a dual-layer structure that bonds a metal layer to a resin layer and is fastened to the forged stainless-steel case by six front screws. Its urethane band is textured with a motif derived from heavy jet engine blades, giving the watch a technical, industrial character that suits both office wear and outdoor use.

 

Key Advantages of the Casio G-Shock G-Steel GST-B100-1AJF Japan Import | Bluetooth Tough Chronograph with Solar Assist and Steel Bezel

 

1. Bluetooth Smartphone Link via G-SHOCK Connected

Pairing the GST-B100-1AJF with a smartphone through Bluetooth allows the watch to correct its time automatically and to manage alarms, world time, and other settings from the app. This reduces manual adjustment and keeps the analog hands and digital display aligned with your phone's clock.

 

• Automatic Time Correction: The watch syncs to the correct local time through the connected app.
• App-Based Control: Alarm, world time, and timer settings are adjusted from the phone.
• Phone Finder: A built-in function helps locate a paired smartphone.

 

2. Tough Solar Charging System

The dial incorporates a solar cell that converts light into power, feeding the watch's rechargeable battery and reducing reliance on routine battery replacement. Casio's Tough Solar system supports the analog-digital display, Bluetooth communication, and chronograph functions during daily wear.

 

• Light-Powered: Charges from daylight and indoor light sources.
• Power Indicator: The display shows the current charge level.
• Low-Power Handling: Power-saving behaviour conserves energy when the watch is left in the dark.

 

3. Dual-Layer Bezel and Forged Stainless-Steel Case

The G-STEEL design uses a bezel that combines a metal layer with a resin layer, secured to a forged stainless-steel case by six front screws. This layered approach maintains G-Shock shock resistance while giving the GST-B100-1AJF the visual weight and finish expected of a steel analog chronograph.

 

• Forged Case: Stainless-steel construction with G-Shock shock-resistant architecture.
• Two-Layer Bezel: Metal and resin layers fastened with six front screws.
• Black Dial: High-contrast analog display with digital sub-windows.

 

4. Analog-Digital Chronograph Layout

The GST-B100-1AJF presents time through analog hands while digital sub-dials handle chronograph, mode, and status information. This hybrid layout suits users who prefer the legibility of a traditional chronograph face but still want digital readouts for timing and connectivity status.

 

• Chronograph Function: Elapsed-time measurement in the G-STEEL Tough Chronograph format.
• Analog Hands: Hour, minute, and sub-dial hands on a black dial.
• Digital Displays: Small LCD windows for mode, date, and connection status.

 

5. 200-Meter Water Resistance and Jet-Blade Band Design

With a 200-meter water resistance rating, the watch is built for swimming and water sports. The urethane band is styled after heavy jet engine blades, a design motif that visually ties the GST-B100-1AJF to the broader G-STEEL line and to the technical, aviation-influenced aesthetic associated with it.

 

• 200 m Water Resistance: Suitable for swimming and water activities.
• Urethane Band: Durable resin strap with an engine-blade texture motif.
• Wearing Size: 58.1 x 53.8 x 14.1 mm case for a substantial wrist presence.

 

6. Japan Import Reference for Collectors

This listing covers the Japan-market GST-B100-1AJF reference, which is distinct from export codes such as GST-B100-1A sold in other regions. Buyers who follow JDM G-Shock releases or who want the Japan-issued model number on the case and paperwork will find that reference here.

 

• JDM Reference: Model code GST-B100-1AJF used in the Japanese market.
• G-STEEL Line: Part of Casio's metal-exterior G-Shock family.
• Colourway Specific: Black dial and black resin band variant.

 

The Casio G-Shock G-Steel GST-B100-1AJF Japan Import is best suited for G-Shock collectors and everyday wearers who want a steel-bodied analog chronograph with Bluetooth time correction, solar charging, and 200-meter water resistance in a single watch.

Specifications of Casio G-Shock G-Steel GST-B100-1AJF Japan Import

Brand Name	Casio
Model number	GST-B100-1AJF
Part Number	GST-B100-1AJF
Model Year	2017
Case diameter	5.4 centimeters
Case Thickness	14.1 millimeters
Band Color	Black
Dial color	Black
Item weight	3.56 Ounces
Movement	Japanese Quartz
Display Type	Digital

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Specifications
[Brand Name ]	Casio
[Model number ]	GST-B100-1AJF
[Part Number ]	GST-B100-1AJF
[Model Year ]	2017
[Case diameter ]	5.4 centimeters
[Case Thickness ]	14.1 millimeters
[Band Color ]	Black
[Dial color ]	Black
[Item weight ]	3.56 Ounces
[ Movement ]	Japanese Quartz
[Display Type ]	Digital

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