G-Shock Gravitymaster GRB300-8A2

$649.00$649.00

The GR-B300 features a Carbon Core Guard structure, which delivers the shock-resistance, rigidity, and corrosion-resistance of carbon material used in aircraft fuselages. The carbon fibre-reinforced resin case and the seamless bezel design inspired by next-generation aircraft come together in a bold and powerful form.

Envision the world through a pilot’s eyes with the flight log memory function for recording current location and time, as well as dual-time simultaneously displaying the time in two time zones. In addition, simply tap on the app to instantly switch between the time back home and local time — a practical function to make traveling abroad that much smoother. 

Large, dimensional index marks and a metal bezel accentuating the large watch face exude functionality, enhancing the visibility that is so important for pilots, whose job demands intuitive reading of time.

The rotary disc indicator at the 9 o’clock position uses a dual-coil motor to ensure smooth rotation and functional beauty. The indicator not only rotates to display alarm on/off and stopwatch; it functions as a battery level indicator as well.

The high-contrast black and white colour scheme dotted with colour accents on the dial and buttons evokes the look of a cockpit instrument panel, while dark colour variations express the practical functionality of an aviation worldview. 

Key resin components used in the case, bezel, and band are made with bio-based resin, a material expected to help reduce environmental impact.

  • Case size (L× W× H): 59 × 54.7 × 15.7 mm
  • Weight: 71 g
  • Case and bezel material: Carbon / Bio-based resin
  • Mineral Glass
  • Screw Lock Crown
  • Band: Bio-based resin band
  • Compatible band size: 145 to 215 mm
  • Neobrite
  • Shock Resistant
  • Carbon Core Guard structure
  • 200-metre water resistance
  • Bluetooth: Connects to a smartphone and automatically adjusts the time
  • Tough Solar (Solar powered)
  • Approx. battery operating time:
    5 months on rechargeable battery (operation period with normal use without exposure to light after charge)
    18 months on rechargeable battery (operation period when stored in total darkness with the power save function on after full charge)
  • Accuracy: ±15 seconds per month (with no mobile link function)
  • Mobile link (Wireless linking using Bluetooth®)
  • Apps: CASIO WATCHES
  • App connectivity features:
  • Auto time adjustment
  • Easy watch setting
  • Approximately 300 world time cities
  • Flight log
  • Phone finder
  • World time: Dual time (Home City time swapping)
  • 1-second stopwatch
    Measuring capacity: 23:59'59.
    Measuring modes: Elapsed time, 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
  • LED light (Super Illuminator)
  • Afterglow
  • LED: White
  • Full auto-calendar (to year 2099)
  • Power Saving (hands stop to save power when the watch is left in the dark)
  • Battery level indicator
  • Date display
  • Day indicator
  • Regular timekeeping:
    Analogue: 3 hands (hour, minute (hand moves every 10 seconds), second), 3 dials (dual time hour and minute, dual time 24-hour, day)

We try to stock as much as possible in our holdings at all times however due to fluctuations in sales trends and availability through Casio Australia we sometimes will not have every item in stock.

We dispatch all orders that are in stock the next business day or same business day when your order placed before 10am (Queensland time) providing we have the watch in stock.


RETURNS
We want you to be happy with your watch and therefore we will gladly refund any item for you within 30 days of dispatch. The item must be returned to us in new and unworn condition and include all components including the watch, tags, box and instruction manual. You will need to include your warranty card or receipt with your watch showing the date of purchase. Email us and we will reply with the appropriate information for your claim.


Casio Watch Repairs

G Life Watches is able to have your watch repaired for you.

Casio G-Shock Watch & Baby G Repair 

Most common repairs required are just batteries and pressure testing or band replacements. Whatever is required we can arrange to have it repaired and returned to you as quickly as we can. Please click here to email us with your contact details, model number off the back of the watch (it will be letter(s) followed by numbers i.e. DW6900 or GA110 or similar) and colour (if applicable i.e. band colour, case colour etc) and we will be more than happy to follow up on the availability, time frame and cost estimate for your repair or part. Most repairs take around 3 weeks to complete and return to you. Parts are generally 1 week but can be up to 4 weeks.

 

G Shock Replacement Prices 

The estimate of charges (note though this is a guide for most models, some of the more intricate models can be higher than the estimates here):

  • Battery, seals and pressure test - $70 (Baby G) / $80 (G Shock) for most models
  • Mudmaster / Premium series - battery, seals and pressure test - $95
  • Replacement Bands (rubber) - $50 to $70 for most models
  • Replacement Bands (metal) - $80 - $110 for most models
  • Pins for bands - $7 for most models
  • Replacement of watch case - $80 - $150 for most models
  • Complete overhaul with a new module/movement in the watch - Contact us with your model number and colour for a tailored quote.

What to do with Broken Watches? 

G Shock Battery Replacement

G Shock battery life ranges from two to six years, depending on how often you use the alarm or the backlight. Frequent use of either feature drains the battery pretty fast hence, the need for replacement. The life of the replacement battery, on the other hand, depends on how long it has been sitting on the shelf. Its shelf life is ten years in room temperature after which it goes through gradual degradation.

G Shock Strap Replacement 

G Shock watches are known to last a lifetime, but the bands wear out after prolonged use. To replace them, place the watch facing downwards on a soft cloth, unhook the spring bars located at the base of each strap. Some models have the bars covered while others are exposed. Use a spring-bar removal tool to unhook and pull the band away from the watch. Repeat the process to remove the other spring bar. Replace them with the rod slots of the new band and use the spring-bar tool to fasten the bands. The procedure applies when replacing rubber straps. Metallic bands require a little tact hence, the need to engage a professional.