A pair of tan-accented MASTER OF G timepieces
Published 1 Oct 2026
The MASTER OF G professional line is defined by a passion for challenging the limits of toughness. This pair of MUDMASTER and FROGMAN watches employ accents in a shade of tan, a utility color commonly used for rugged gear, to create appearances that exude practicality. Eschewing any decorative elements, the accents set off the designs with an understated sense of presence against an otherwise all-black design. Each of these timepieces powerfully projects the MASTER OF G identity with its ongoing commitment to delivering true, ultimate practicality.
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GWG-B1000
FEATURES
MUDMASTER GWG-B1000
A tan hue widely employed in tactical gear highlights dial components and feature indicators on the bezel, emphasizing the practicality in actual field use that the MUDMASTER line is committed to delivering. The multi-component case exteriors are finished in black with varying textures for individual materials and components. Paired with a matte olive-green urethane band, the finishing expresses an intrepid yet understated sense of toughness.
Shock, dust, mud, and vibration resistance: Tough structure designed to deliver mastery of the field
The watch employs a guard structure combining components made from different materials, including stainless steel and carbon fiber-reinforced resin. Sophisticated metalwork creates complex forms for components such as the bezel and the front button guard with impressive precision.
In addition, the case also features cylindrical stainless-steel components to guard the buttons, as well as gaskets on the button shafts and a screw-lock crown to prevent the intrusion of mud and dust. Also, the bottom and sides of the module incorporate αGEL to ensure vibration resistance.
* αGEL is a registered trademark of Taica Corporation.
* Image shows the GWG-B1000-1A.
Triple Sensor
Measures compass bearing, altitude/barometric pressure, and temperature. The seconds hand indicates north, while the indicator hand shows the recorded direction (bearing memory) and the direction to a point recorded in the app from the watch and/or a point manually set on the map within the app (Location Indicator).* These handy features help with checking the direction of a desired destination.
* In China, users are unable to manually set a point in the app.
Solar-powered timekeeping with radio control and Bluetooth® connectivity
Smartphone Link and radio-wave time calibration deliver automatic time adjustment. Solar-power charging ensures stable operation of watch functions.
Super Illuminator
High-brightness full-auto double LED light improves watch readability in the dark.
Bio-based resin
Key resin components used in the bezel, case, and band are made with bio-based resin, a material expected to help reduce environmental impact.
* Image is included for illustrative purposes.
Sapphire crystal
Scratch-resistant, highly transparent, and treated with anti-reflective coating to deliver excellent clarity and readability.
GWF-D1000BC
FEATURES
FROGMAN GWF-D1000BC
Tan accents inspired by tactical gear are used to striking effect, expressing the true utility that the MASTER OF G line is committed to delivering. Harmonizing with the otherwise all-black color scheme, the design evokes the functional beauty of professional tools. A diamond-like carbon (DLC) coating is applied to the bezel and black IP to the front screws to enhance the metal materials’ textural appeal.
ISO 200-meter water resistance: Supporting professional diving
In combination with the screw-lock case back providing a tight seal, the stainless-steel case, built to withstand high water pressure, ensures compliance with ISO standards for water resistance. The crystal uses sapphire glass thicker than standard. The iconic FROGMAN diving frog engraved on the case back symbolizes the unique identity of the only diver’s watch in the G-SHOCK lineup.
* Image shows the GWF-D1000-1.
Composite band for a lightweight and comfortable fit on the wrist
H-links embedded with metal components connect to center links made of fine resin to deliver both strength and light weight. The band is extendable in two increments as well, so it can even be worn over a wetsuit. The buckle features a screw-type adjustment configuration that enables the length to be fine-tuned.
Triple Sensor
Measures water depth, compass bearing, and temperature. The Triple Sensor has been specifically adapted for the FROGMAN, delivering precision measurements to meet the demands of professional divers. The depth gauge provides measurements in 10-cm increments to a maximum depth of 80 meters. The digital compass with auto horizontal compensation delivers accurate readings even underwater, where maintaining a stable posture can be difficult.
* Image shows the GWF-D1000-1.
Multiband 6 radio control and solar power
Receives standard time radio waves from six locations around the world and corrects the time automatically. Solar-power charging ensures stable operation of watch functions.
Super Illuminator
The high-brightness full-auto LED backlight offers enhanced readability in the dark.
Bio-based resin
Key resin components used in the band are made with bio-based resin, a material expected to help reduce environmental impact.
* Image is included for illustrative purposes.
Sapphire crystal
Scratch-resistant, highly transparent, and treated with anti-reflective coating to deliver excellent clarity and readability.
SPECIFICATIONS
Multiple functions, all at your fingertips
CASIO WATCHES
(Smartphone app)
GWG-B1000
- Automatic time adjustment (four times a day)
- Easy watch setting
- World time (about 300 cities)
- Mission Log: The altitude measured by the watch and the course obtained from a smartphone’s GPS are automatically recorded by the app. An altitude point can be plotted on the map.
- Location Indicator: Watch displays the direction and distance to a location which is recorded using Location Memory or manually set on the map within the app.1
- Location Memory: Pressing a button on the watch records the current location on a map within the app.
- Mode customization: The watch modes can be turned on and off in the app, allowing only the required functions to be enabled and the order of the modes to be rearranged according to need or situation.
- Automatic altitude adjustment: Altitude measurement values on the watch are automatically adjusted based on altitude data acquired from the smartphone GPS.2
- Phone finder
1 In China, users are unable to manually set a point in the app.
2 Since GPS information may contain errors in principle, the measurement values may not match the actual altitude.
Watch Functions
GWG-B1000
• Shock-resistant structure
• Dust- and mud-resistant structure
• Vibration-resistant structure
• 20 bar water resistance
• Solar-powered
• Smartphone Link
• Radio-controlled (Multiband 6)
• Auto hand home position correction
• Hand shift feature
• Digital compass
• Barometer
• Altimeter
• Thermometer
• Sunrise and sunset time display
• World time (55 cities)
• 1/100-second stopwatch
• Countdown timer
• 5 daily alarms
• Full-auto double LED light
(Super Illuminator)
GWF-D1000BC
• Shock-resistant structure
• ISO 200-meter water resistance
• Solar-powered
• Radio-controlled (Multiband 6)
• Depth gauge
• Digital compass
• Thermometer
• Diving functions
• Diving log data
• Time stamp
• World time (48 cities)
• Moon data
• Tide graph
• 1/100-second stopwatch
• Countdown timer
• 5 daily alarms
• Full-auto LED backlight
(Super Illuminator)
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