Casio G-Shock GRAVITYMASTER | GRB300RY-1A9
Whatever you’re doing, wherever you are — the G-SHOCK Master of G line has your back. For total support in the harshest environments, this GRAVITYMASTER watch delivers peak performance in punishing conditions in air. It features bold black to exude toughness and a band in the same bright yellow used for emergency rescues and safety signs. This innovative design is a sure fit for the world of professionals involved in rescue efforts and other critical missions. The organic form of the GRAVITYMASTER GR-B300RY is inspired by next-generation aircraft and rendered with a seamless exterior design. The Carbon Core Guard structure and wide 3D face deliver durability, readability, and a comfortable fit. Enjoy all the practical functions as well, including dual-time simultaneously showing the time in two cities, a flight log memory function for recording routes traveled, and more. This tough watch delivers what you need to make quick decisions and take decisive action in the harshest of environments.
| SKU | GRB300RY-1A9 |
| Barcode | 889232397924 |
| Reference Number | Tough Solar (Solar powered) |
| Movement | Bluetooth: Connects to a smartphone and automatically adjusts the time |
| Case Size | 59 × 54.7 × 15.7 mm |
| Case Material | Carbon / Bio-based resin |
| Crystal | Mineral Glass |
| Water Resistance | 200-meter / Shock Resistant |
| Type Of Strap | Bio-based resin band |
| Manufacturer Warranty | 1 year |






