G-Shock
Gravity Master Black Resin Band Watch
GRB300-1A
or 4 payments of $112.50
- Repay in 4 installments fortnightly, interest-free.
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Gravity Master Black Resin Band Watch
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Extended gift returns & exchanges: order by 31 Dec, return or exchange until 31 Jan 2027. Details
Gravity Master Black Resin Band Watch
or 4 payments of $112.50
- Repay in 4 installments fortnightly, interest-free.
- The maximum purchase amount is $3,000.
- Learn more about Afterpay
Gravity Master Black Resin Band Watch
Register to receive a notification when this item comes back in stock.
Overview
- Case size
- 59 mm
- Movement
- Solar
- Functions
- Power reserve indicator
- Day Display · Alarm
This GR-B300 Gravitymaster men's watch is a piece of professional aviation gear built with a shock-resistant Carbon Core Guard structure, blending carbon-fibre reinforced resin and metal for extreme durability and lightness.
Its organic, seamless design is inspired by next-generation aircraft, and it is housed in a substantial case measuring 5.9 centimetres long by 5.47 centimetres wide and 1.57 centimetres thick. The black and white colour scheme on the large, three-layer 3D face, which includes a rotary disc indicator, evokes a cockpit instrument panel for enhanced readability. Powered by Tough Solar and connected via Bluetooth®, it offers dual time and a flight log function, with key resin components made from bio-based materials for environmental consideration.
Specifications
- Model/Item Number
- GR-B300-1A (GRAVITYMASTER, Master of G - AIR)
- Weight
- 71 g
- Construction
- Shock Resistant, Carbon Core Guard structure, Layer Guard structure
- Band Material
- Bio-based resin band
- Closure
- Screw Lock Crown
- Functions
- Dual time (Home City time swapping), 1-second stopwatch (up to 23:59'59''), Countdown timer (24-hour range), Daily alarm, Full auto-calendar (to year 2099), Date display, Day indicator, Rotary disc indicator (for battery level, alarm on/off)
- Other Features
- Flight log memory function (via app), Screw Lock Crown, Bio-based resin materials
- Gender
- Male
- Features
- Case Dimensions (L× W× H) 59 mm × 54.7 mm × 15.7 mm (5.9 cm × 5.47 cm × 1.57 cm)
- Case and Bezel Material Bio-based Carbon / Bio-based resin
- Power Supply Tough Solar (Solar powered)
- Run Time (Approximate) 5 months (normal use); 18 months (with Power Save on)
- Glass Mineral Glass
- Dial Analog display, large-diameter triple-layer 3D dial with Neobrite
- Light LED light (Super Illuminator) with afterglow (White LED)
- Time Adjustment Mobile link (Bluetooth®) for automatic time adjustment
Built not to break
A module that floats
Inside a hollow case, the module (the heart of the watch) seems to float, so knocks from outside are softened before they reach it. The idea came from watching children play with a rubber ball.
Tough Solar
A thin, film-like solar panel is fitted into the dial around the display, and it turns even weak light, such as from fluorescent lamps, into power.
2-year warranty
Every G-SHOCK watch from Watch Direct comes with a 2-year warranty from Shriro Australia, Casio’s exclusive Australian distributor.
Watch Direct is an authorised G-SHOCK retailer, trading since 2011.
About G-SHOCK
G-SHOCK began with a dropped watch. Casio designer Kikuo Ibe saw a watch break when it fell, and proposed “a durable watch that would not break even if dropped”. The project set itself the “Triple 10” goal: survive a 10-metre drop, resist water to 10 bar and run for 10 years on one battery. The first G-SHOCK, the DW-5000C, arrived in 1983.
Shop all G-SHOCK
Reviews
Shipping & Returns
Free Shipping Anywhere in Australia
- Get Your Order Shipped in Record Time - Most Orders Sent Within 24 Hours!
- Efficient Same Day Delivery in Sydney - Calculated at Checkout
- Signature on Delivery is included on all shipments within Australia.
- DHL Express is available for fast and secure international shipments.
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Returns Policy
Holiday gift returns: orders placed 1 November to 31 December 2026 can be returned or exchanged until 31 January 2027.
To be eligible for a return, your item must be in the same condition that you received it, unworn or unused, with tags, and in its original packaging. You’ll also need the receipt or proof of purchase.
View our Returns Page for More Information