BUILT TO SURVIVE THE HARSHEST ENVIRONMENTS ON EARTH.
The MASTER OF G Mud resistant range brings military grade toughness & features regardless of the environment or mission ahead. Boasting ultra-reliable solar power & tools for the field such as built in compass, altimeter, barometer and more, The MASTER OF G collection is built to go beyond.
LINE UP
GPR-H1000
RANGEMAN
£449
GWG-B1000
MUDMASTER
£699
GG-B100
MUDMASTER
£349
THE GG-B100:
BUILT TO ENDURE
Since its debut, the GG-B100 MUDMASTER has earned its stripes as the go-to tool for those who operate where others won’t. Whether it’s deep in the jungle, high in the mountains, or on the edge of the map, this is a watch made to survive the extreme.
MISSION FOCUSED
Equipped with Quad Sensor Technology and Bluetooth connectivity, the GG-B100 syncs seamlessly with the CASIO WATCHES APP to provide critical data in the field. Log missions with the Mission Log, track your bearings using the Digital Compass, and monitor your environment with the Altimeter, Barometer, and Thermometer vital tools for anyone venturing into the unknown.
EARTH-PROOF ENGINEERING
True to its name, the MUDMASTER features Carbon Core Guard construction and a dust- and mud-resistant structure, built to handle brutal conditions. From shifting sands to torrential mudflows, this watch keeps going. 200M water resistance, shock resistance, and a reinforced case design make the GG-B100 a reliable ally wherever the mission takes you.
THE NEW RANGEMAN: GPR-H1000
The RANGEMAN GPR-H1000 storms back into the Master of G lineup with a fierce new presence - bigger, bolder, and built to dominate unforgiving environments. Born for the wild and refined for endurance, this is the first Rangeman to feature a heart rate monitor, bringing next-level performance data to a watch already trusted in the most hostile terrain.
ADVENTURE CALLING
From jagged lava fields to remote desert ridges, the GPR-H1000 is your tactical edge. Designed as a full-scale survival tool, it packs a Triple Sensor suite - Compass, Altimeter, Barometer - alongside advanced fitness tracking, GPS navigation, and real-time heart rate monitoring. Whether you’re pushing through dust-choked canyons or scaling volcanic peaks, this watch tracks every step, breath, and heartbeat.
MISSION CONTROL ON YOUR WRIST
Connect to the CASIO WATCHES APP to map routes, log missions, customise watch displays, and set performance targets. The H1000 isn’t just tough, it’s smart, giving you the freedom to adapt your tools to the terrain ahead.
ENGINEERED TO BE UNBREAKABLE
With steel shock absorbers, reinforced casing, and a rugged shell built to take on impact after impact, the RANGEMAN doesn’t flinch. The bold design isn’t just for show, it’s a shock-resistant fortress. An ultra-legible MIP screen ensures clarity at a glance, even in harsh light or dusty whiteouts.
SOLAR-POWERED. GPS-SYNCED. ALWAYS ON.
Stay charged wherever the mission leads with Tough Solar - powered by any light source. And with automatic GPS time sync, your RANGEMAN stays accurate across time zones and terrains. This is endurance tech with zero compromise.
The GWG-B1000: A TACTICAL POWERHOUSE
A trusted name in the harshest environments since 2015, the MUDMASTER returns in its most advanced form yet. The GWG-B1000 is engineered from the ground up with a completely reimagined case, next-generation materials, and mission-critical upgrades merging raw strength with high-precision capability. This is more than a tool; it’s your field-ready command centre.
MISSION READY
Equipped with Bluetooth connectivity, the GWG-B1000 works seamlessly with the CASIO WATCHES APP, offering Mission Log and Location Indicator modes to mark, track, and navigate key coordinates with precision. The built-in Compass and Altimeter put directional awareness at your fingertips, ensuring you always stay locked on course, even in the most remote terrain.
ADVENTURE PROOF
Engineered to thrive where others fail, the GWG-B1000 is built to defy dust, mud, and impact with uncompromising resilience. The Triple Sensor system includes a Barometer that warns of incoming weather shifts with sudden pressure drops, a Thermometer to monitor ambient temperature, and Sunrise/Sunset modes to help plan movements around daylight. From sudden storms to shifting climates, you’ll always be one step ahead.
POWERED BY THE ELEMENTS
Behind the toughness lies smart power: the Tough Solar charging system keeps the GWG-B1000 mission-ready at all times by converting even the weakest light into energy. Whether you're navigating under dense canopy or in arid sun-baked deserts, the watch stays charged, no downtime, no compromises.
SPECIFICATIONS
| Feature | Description |
|---|---|
| 12/24 Hour Format | Digital time display can be configured to either 12-Hour or 24 Hour Format |
| Water Resistant | 200 Metres Water Resistant |
| Accuracy | +/- 15 seconds per month |
| Alarm Function | 5 Daily Alarms: Each will sound every day at the time you set |
| Altimeter Function | A built-in pressure sensor measures barometric pressure, which is converted to relative altitude, Measuring range: -700 to 10,000m (-2,300 to 32,800ft) |
| Auto Calendar | Once set, the automatic calendar always displays the correct date |
| Backtrack function | The watch helps users navigate back to where they started, using track data to display the route back to the starting point and bearing. |
| Barometer Function | A built-in air pressure sensor measures ambient air pressure and presents this on a display to indicate weather patterns, Display range: 260 to 1,100 hPa (7.6 to 32.5 inHg) |
| Battery Level Indicator | A warning appears on the display whenever battery power drops below a certain level. |
| Bluetooth® Connectivity | Low Energy Support, Phone Finder: Pressing a button on the watch will emit an audible tone from your phone, even in silent mode., The watch can be wirelessly connected to a compatible smartphone or tablet via Bluetooth. The energy-saving technology enables access to a host of functions., Connect using the G-SHOCK Connected App- Auto time adjustment , Simple watch setting , Approximately 300 world time cities, Time & place, Phone finder, Tide point setting, Diving log |
| Built in Sensors | Magnetic (direction), Pressure (atmospheric/ altitude), Accelerometer and Gyrometer, Twin Sensor, Magnetic Compass and Thermometer |
| Compass Function | A built-in direction sensor detects magnetic north displaying both this and your current direction on the watch face. |
| Core Guard Structure | New Carbon Core Guard Structure |
| Countdown Timer Function | Countdown Range: 60 minutes, Measuring Unit: 1 second |
| Crown button lock | The crown locks into place to ensure water resistance and avoid accidental changes to settings |
| Date and Weekday Display | The current date and week day are displayed on the watch face |
| Date Display | The current date is displayed on the watch face |
| Dual Time | Simultaneous display of the current time in two different time zones. |
| Hand Shift Function | With a push of a button, hands move away from the LCD to permit free visibility. |
| Display Illumination | Auto Light: The watch face will illuminate automatically when you tilt your wrist towards you. Once activated, this feature will automatically deactivate after six hours. |
| Magnetic Resistance | The case has been specially mounted to be shielded from magnetic fields. |
| Mud Resistant | Dirt and Mud Resistant construction keeps soil, debris and rubble from getting into the watch |
| Neobrite | A luminous coating on the watch hands provides illumination in the dark. |
| Radio Controlled Timekeeping | Multi-Band 6: Automatic Atomic Time updates are received overnight for exceptional accuracy (UK/ EU/ USA/ Japan/ China: home city must be set manually) |
| Sapphire Crystal Glass | High-clarity glass with the highest level of scratch resistance. |
| Shock Resistant | Patented Hollow Core Guard Structure protects against impact and vibration |
| Solar Power | Powered by any light source, saving time and money as no battery change required- known as TOUGH SOLAR |
| Stopwatch Function | Measuring Capacity: 24 hours, Measuring Unit: 1/100 second (for the first 60 minutes) 1 second (after 60 minutes) |
| Sunrise/Sunset Display | Sunrise and Sunset times are displayed for your chosen location. Ideal for planning outdoor activities. |
| Weight (Gram) | 115 |
| Tough MVT | Automatic Hand Adjustment: The automatic hand adjustment function checks the home position of the hands every hour and corrects if necessary counteracting any discrepancies arising from impact or magnetic forces. |
| World Time | Displays the current time in major cities and specific areas around the world |