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GRB300-1A Gravitymaster
Jewelry & Watches · Master of G Air

GRB300-1A Gravitymaster

A pilot-oriented Gravitymaster with solar power, Bluetooth and a clean analog cockpit dial.

$330 at G-SHOCK
G-SHOCK $330 ↗

Prices are a snapshot from when this page was built — confirm on the retailer's site.

Story & heritage

Casio’s GR-B300 Gravitymaster page frames the line around flight innovation, Bluetooth connectivity and pilot readability, while Wikipedia notes Gravitymaster as the family where G-SHOCK pursued GPS-hybrid time reception in earlier Master of G models.

The GRB300-1A is the current lighter analog expression of that air-focused branch.

Materials & craft

The model uses Carbon Core Guard structure, Tough Solar, Bluetooth smartphone link, Super Illuminator LED light, shock resistance and 200-meter water resistance.

The large three-dimensional dial is designed for quick reading, giving the watch its cockpit-instrument character without adding a digital face.

GravitymasterTough SolarBluetooth linkCarbon Core Guard200 m water resistance

How to choose & style

Wear it with flight jackets, tapered cargos, travel trousers and technical polos. The mostly analog dial makes it easier to dress down than the larger sensor models.

GRB300-1AGravitymasterMaster of G Air
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