Casio G-SHOCK GRAVITYMASTER GR-B300EC-1AJF Solar Aviation Watch
Casio G-SHOCK GRAVITYMASTER GR-B300EC-1AJF Solar Aviation Watch
The Casio G-SHOCK GRAVITYMASTER GR-B300EC-1AJF is part of the MASTER OF G aviation series and the Emergency Colors collection. It combines Tough Solar power, Bluetooth Mobile Link connectivity, shock resistance, and 200-meter water resistance in a large carbon-reinforced case.
The watch features an analog-digital display with high-visibility orange and yellow accents, mineral glass, Neobrite hands and markers, and a bio-based resin band. Its Casio 5719 module provides dual time, world time, flight logging through the CASIO WATCHES app, stopwatch, countdown timer, daily alarm, automatic time adjustment, and phone-finder functionality.
The GR-B300EC-1AJF measures 59.0 × 54.7 × 15.7 mm and weighs 71 grams. Its Tough Solar system provides approximately five months of operation under normal use, or approximately 18 months with power saving enabled.
Key Features
Casio 5719 Tough Solar quartz module
GRAVITYMASTER aviation watch from the MASTER OF G series
Carbon Core Guard structure with shock resistance
Bluetooth Mobile Link with CASIO WATCHES app
Flight Log, automatic time adjustment, world time, and Phone Finder
Mineral glass with Neobrite hands and markers
Bio-based resin band with 145–215 mm wrist fit
200-meter water resistance
Specifications
Specification | Details |
Brand | Casio |
Model / Reference | GR-B300EC-1AJF |
Collection / Series | G-SHOCK MASTER OF G / GRAVITYMASTER |
Movement | Casio 5719 |
Movement Type | Tough Solar quartz |
Case Material | Carbon-fiber-reinforced resin, resin, and stainless steel components |
Case Diameter | 54.7 mm |
Case Thickness | 15.7 mm |
Crystal | Mineral glass |
Bracelet / Strap | Bio-based resin band |
Water Resistance | 200 m / 20 bar |
Functions | Dual time, world time, flight log, automatic time adjustment, stopwatch, countdown timer, daily alarm, Phone Finder, battery-level display, date and day display |
Power Reserve | Approximately 5 months in normal use; approximately 18 months with power saving |
Other | Bluetooth Mobile Link, Carbon Core Guard structure, Super Illuminator LED, full automatic calendar through 2099 |
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