G-SHOCK GRAVITYMASTER GR-B300 | May 2024

A timepiece for aviation lovers with a cutting-edge design delivering strength and functionality

Introducing a trio of new models featuring the Carbon Core Guard structure, which leverages the special properties of a carbon material also used in aircraft fuselages. This structure, combined with the seamless bezel design inspired by next-generation aircraft, creates a form both cutting-edge and powerful. Enjoy all the practical features as well, including dual-time simultaneously displaying the time in two time zones and a flight log memory function for recording the current location and time, routes travelled, and more. The sky is the limit — so this watch expresses a passion for aviation in a style befitting the GRAVITYMASTER line.

Lineup

A table comparing the facets of 3 products
Facet	GRB300-1A View details	GRB300-1A4 View details	GRB300-8A2 View details
Price
Price	Regular price $699.00	Regular price $699.00	Regular price $699.00
Band
Band	Bio-based resin band	Bio-based resin band	Bio-based resin band
Case and bezel material
Case and bezel material	Bio-based Carbon / Bio-based resin	Bio-based Carbon / Bio-based resin	Bio-based Carbon / Bio-based resin
Case size (L× W× H)
Case size (L× W× H)	59 × 54.7 × 15.7 mm	59 × 54.7 × 15.7 mm	59 × 54.7 × 15.7 mm
Water resistance
Water resistance	200-metre water resistance	200-metre water resistance	200-metre water resistance
Weight
Weight	71 g	71 g	71 g
Glass
Glass	Mineral Glass	Mineral Glass	Mineral Glass
Compatible band size
Compatible band size	145 to 215 mm	145 to 215 mm	145 to 215 mm
Crown
Crown	Screw Lock Crown	Screw Lock Crown	Screw Lock Crown

Seamless design offering functional beauty

An organic form inspired by next-generation aircraft is expressed with the seamless exterior design. A sense of unity is achieved by connecting the exterior surfaces, from the case to the band, smoothly and seamlessly. This design creates a tough, cutting-edge look, seemly for a new addition to the GRAVITYMASTER line.

3D face design for enhanced readability

The large-diameter, triple-layer dial with a sense of depth ensures readability for pilots, whose job demands intuitive reading of time. In addition to large, dimensional index marks and inset dials inspired by instrument panels, the metal bezel accentuating the large watch face ensures this design exudes functionality.

Dual time: Simultaneous display of time in two cities

The main dial and inset dial simultaneously display times in two cities located in different time zones. A dedicated app makes it easy to configure world time settings. Switching between home time and world time is a snap, as well. This watch puts accurate time management just a fingertip away.

Colouration evoking the look of a cockpit

A high-contrast black and white colour scheme enhances the visibility of the watch hands and index marks, components responsible for the most vital watch functions. Red and blue colour variations are offered as well, with the red model inspired by the display colour of a cockpit instrument panel’s nighttime illumination, and the blue, that of a head-up display (HUD). These distinctive combinations of colour deliver practical functionality expressing an aviation worldview.

Flight log: Helpful for flight history management

Sync the watch with a smartphone and press a button on the watch to record the current time and position on a map within the dedicated app — a useful function for managing flight logs with details including times and locations of departure and arrival. In addition, plotted data can be grouped for batch management of travel record details including points of departure, transit points, and home destinations.

Layer Guard and Carbon Core Guard structures: Featuring innovative combinations of materials

The intricately shaped bezel employs integrated moulding and has two rings — a metal ring and a urethane ring — installed beneath it. This combination of materials gives the bezel — a structural component — a refined visual presence that embodies the intricacy and sophistication of next-generation aircraft. The case is made with carbon fibre-reinforced resin, a material delivering both strength and lightness. The side buttons have anti-slip texturing inspired by hazard warning stripe tapes, and the guards beneath the buttons have been eliminated for even better operability.