Casio G-SHOCK GRAVITYMASTER GR-B300-1A4JF Solar Watch
Casio G-SHOCK GRAVITYMASTER GR-B300-1A4JF Solar Watch
The Casio G-SHOCK GRAVITYMASTER GR-B300-1A4JF is a fully analog MASTER OF G – AIR watch featuring Tough Solar power and Bluetooth Mobile Link. Released in Japan in May 2024, this aviation-inspired model combines a high-contrast black dial with white elements and orange-red accents.
Its 54.7 mm case uses bio-based carbon, bio-based resin and stainless steel, with a Carbon Core Guard structure providing shock resistance while keeping the watch to 71 g. The three-dimensional dial includes large indices, dual-time displays and a rotary disc indicator at 9 o’clock. A bio-based resin strap completes the lightweight construction.
The watch connects to the CASIO WATCHES app for automatic time adjustment, simplified settings, approximately 300 world-time cities, Flight Log and Phone Finder. Additional functions include a 24-hour stopwatch, countdown timer, daily alarm, full auto-calendar, battery indicator and Super Illuminator LED light. Water resistance is rated to 200 metres.
Key Features
Tough Solar-powered analog Module 5719
Shock-resistant Carbon Core Guard construction
Bluetooth Mobile Link with automatic time adjustment
Dual time with Home City time swapping
Flight Log location and time recording through the CASIO WATCHES app
Rotary disc indicator for operating status and remaining charge
White Super Illuminator LED with afterglow
200-metre water resistance
Specifications
Specification | Details |
Brand | Casio |
Model / Reference | GR-B300-1A4JF |
Collection / Series | G-SHOCK MASTER OF G – AIR GRAVITYMASTER |
Movement | Tough Solar |
Caliber | Module 5719 |
Movement Type | Solar-powered analog |
Case Material | Bio-based carbon, bio-based resin and stainless steel |
Case Diameter | 54.7 mm |
Case Thickness | 15.7 mm |
Dial Color | Black with white elements and orange-red accents |
Dial Details | Three-dimensional indices, dual-time display and rotary disc indicator |
Bracelet / Strap | Bio-based resin strap |
Water Resistance | 200 metres / 20 bar |
Functions | Bluetooth Mobile Link, automatic time adjustment, approximately 300 world-time cities through the app, Flight Log, Phone Finder, dual time, 24-hour stopwatch with split timing, 24-hour countdown timer, daily alarm, full auto-calendar through 2099, battery-level indicator, power saving and Super Illuminator |
Power Reserve | Approximately 5 months after a full charge without further light exposure; approximately 18 months with power saving |
Other | Shock resistant; accuracy of ±15 seconds per month when not connected; case dimensions of 59 × 54.7 × 15.7 mm; weight of 71 g |
International Buyers – Import Duties Notice:
Be informed that import duties, taxes, and charges are not included in the item price or shipping cost. These are the buyer's responsibility.
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