G-SHOCK GSTB100D-1A
The G-SHOCK GSTB100D-1A is a premium model in Casio’s rugged G-STEEL collection, combining traditional analog chronograph style with modern smart features and trusted G-SHOCK durability. Featuring a solid stainless steel band and a bold black dial with turbine-inspired rotating disc, this watch delivers both stylish sophistication and performance-ready toughness.
SPECIFICATIONS
| Specification | Details |
|---|---|
| Model Name | Casio G-SHOCK GSTB100D-1A |
| Series | G-STEEL (GST-B100 Series) |
| Design / Color | Silver Stainless Steel with Black Dial |
| Case & Bezel Material | Resin / Stainless Steel |
| Band Material | Solid Stainless Steel Band |
| Clasp Type | One-touch 3-fold Clasp |
| Display Type | Analog Chronograph (3 Hands + Sub Dials) |
| Glass / Crystal | Mineral Glass |
| Shock Resistance | Yes (G-Shock standard) |
| Water Resistance | 200 m / 20 bar |
| Power System | Tough Solar (Solar Powered) |
| Bluetooth Connectivity | Yes — Bluetooth® Mobile Link via CASIO WATCHES app |
| Time Adjustment | Auto time adjustment via smartphone |
| World Time | Dual dial world time & home city swapping |
| LED Light | Super Illuminator LED (high-brightness) |
| Stopwatch | 1-second stopwatch (up to 23:59’59″) |
| Countdown Timer | Yes (24-hour range) |
| Alarms | Daily alarm + hourly time signal |
| Calendar | Full auto-calendar (to year 2099) |
| Battery Indicator | Yes |
| Power Saving | Yes |
| Accuracy | ±15 seconds per month (without mobile link) |
| Case Dimensions (Approx.) | 58.1 × 53.8 × 14.1 mm |
| Weight (Approx.) | 185 g |
G-SHOCK GSTB400-1A
The G-SHOCK GST-B400-1A is a modern and slim G-STEEL watch designed for men who demand both toughness and style. Featuring a bold black dial with a durable resin strap and metal bezel, this watch delivers a powerful and sporty appearance suitable for everyday wear, office, and outdoor adventures.
Specifications
| Feature | Details |
|---|---|
| Model | GST-B400-1A |
| Series | G-STEEL |
| Gender | Men |
| Movement | Tough Solar (Solar Powered) |
| Connectivity | Bluetooth Smartphone Link |
| Case Material | Resin with Stainless Steel Bezel |
| Band Material | Resin Strap |
| Glass | Mineral Glass |
| Display | Analog-Digital |
| Water Resistance | 200 meters |
| Shock Resistance | Yes |
| Structure | Carbon Core Guard |
| World Time | Yes |
| Stopwatch | 1/100-second stopwatch |
| Timer | Countdown Timer |
| Alarm | Multiple Daily Alarms |
| Light | LED Light |
| Power Reserve | Solar rechargeable battery |
| Case Size | Approx. 46.6 × 49.6 × 12.9 mm |
| Weight | Approx. 80 g |
| Color | Black Dial, Black Strap |
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