Casio has added three new G-Shock GravityMaster watches to its Master of G line, and the headline feature is not just the metal bezel. The GWR-B3000 series brings a new movement with shock detection and magnetic field detection, a useful upgrade for a watch that is supposed to survive abuse without losing the plot.
The three Casio G-Shock GravityMaster models are scheduled to go on sale in Japan in July 2026: the GWR-B3000-1A, the blue ion-plated GWR-B3000A-2A, and the gray ion-plated GWR-B3000B-8A. Casio has not confirmed availability outside Japan, which is standard practice for a regional launch but still annoying if you live elsewhere and like your watches overbuilt.
GWR-B3000 size, materials and build
All three watches share the same case dimensions: 56.7 by 47.3 by 14.1 mm, with a weight of 102 grams. Casio says the case uses a dual hollow structure, pairing stainless steel parts made with metal injection molding with a bio-based carbon inner case. The setup supports the center case at four points and adds resin buffers to help absorb impacts, all part of the brand’s Triple G Resist specification for drops, centrifugal force, and heavy vibration.
- GWR-B3000-1A: ¥110,000 ($687)
- GWR-B3000A-2A: ¥126,500 ($790)
- GWR-B3000B-8A: ¥137,500 ($859)
Tough MVT.2 adds sensor-based protection
Inside, Casio’s new Tough MVT.2 movement is the real update. If the watch takes a hard hit, the hands are automatically corrected; if it encounters a strong magnetic field, the hands pause to avoid drifting out of sync and then return to the right position once the interference is gone. That is the kind of defensive engineering that sounds obvious after the fact, which is usually a good sign for a tool watch.
The new GravityMaster also keeps the usual high-end G-Shock conveniences: Bluetooth connectivity through the Casio Watches app, automatic time adjustment, a flight log that maps time and location, and Multiband 6 radio control as backup. Casio rounds out the package with Tough Solar charging, a dark dial with microfabricated textures to cut glare, sapphire crystal with anti-reflective coating, and soft urethane bands using bio-based resins. It is a familiar formula, but the mix of tougher sensing and more sustainable materials shows where the brand is heading while rivals keep adding complications that look better on spec sheets than on a cockpit floor.
Japan pricing sets the tone
The pricing puts the series in classic premium G-Shock territory, with the top model only modestly above the base watch. The more interesting question is whether Casio keeps this sensor-driven movement exclusive to the GravityMaster family or starts rolling it into other Master of G models, because a shock-correcting analog movement is exactly the sort of feature that tends to spread once buyers prove they will pay for it.