Inspired by the immense power and beauty of the natural world, the Magma Gold MUDMASTER from G-SHOCK's flagship MASTER OF G series is a bold expression of toughness and craftsmanship.
Engineered with a forged metal shield exterior and the advanced Carbon Core Guard structure, the GWG-B1000MG offers exceptional durability in a more compact and comfortable form. Fiery red and orange accents evoke the dynamic flow of molten magma, while layered gold ion-plated components and a marbled resin band reflect the rich textures and depth of the Earth's geological strata.
Crafted using bio-based resin, the timepiece embodies G-SHOCK's philosophy of "beauty in toughness," seamlessly blending rugged performance, distinctive aesthetics, and a more environmentally conscious approach to watchmaking.
Specifications
Basic Information
Case Size (L × W × H)
58.7 × 52.1 × 16.2 mm
Weight
114 g
Case and Bezel Material
Bio-based Carbon / Stainless steel
Band
Bio-based resin band
Construction
Shock Resistant
Vibration Resistant
Mud Resistant
Carbon Core Guard Structure
Water Resistance
200-meter water resistance
Time Adjustment
Radio-controlled Watch; Multi Band 6
Bluetooth: Connects to a smartphone and automatically adjusts the time
Power Supply
Tough Solar (Solar powered)
Sensor feature
Compass function:
16 direction / direction angle (0 to 359°) measured, direction continuous measurement (60 seconds), north direction guideline function.
Bearing memory function.
Automatic horizontal, magnetic declination, and orientation correction function.
Barometric pressure measurement function:
(Measurement range: 260~1,100 hPa (7.65~32.45 inHg), 1 hPa (0.05 inHg))
Barometric pressure trend graph display (past 20 hours displayed).
Pressure difference indicator (±10 hPa).
Barometric pressure trend information alarm (when a characteristic change in air pressure occurs, it will be notified by arrows and sound notification).
The pressure trend graph can be changed to measurement every 30 minutes. That's for the last 5 hours.
Changeover between hPa and inHg.
Altitude measurement function / Relative altimeter:
(Measurement range: -700 to 10,000 m (-2,300 to 32,800 ft), in units of 1 m (5 ft))
Advanced memory (up to 30 manual memories of measurement date, month, time, and altitude).
Automatic recording data (highest/lowest altitude, auto accumulation (ascent/descending) memory).
Altitude trend graph.
Altitude difference indicator (±100 m / ±1,000 m).
Measurement interval setting function (every 5 seconds / 2 minutes).
*Every 1 second for the first 3 minutes only.
Changeover between meters (m) and feet (ft).
Temperature measurement function:
(Measurement range: -10 to 60 °C (14 °F to 140 °F), 0.1 °C (0.2 °F))
Changeover between Celsius (℃) and Fahrenheit (℉).
Smartphone Link/App Connectivity Features
Smartphone Link feature
Mobile link (Wireless linking using Bluetooth®)
Apps
CASIO WATCHES
App connectivity feature
Auto time adjustment
Easy watch setting
Approximately 300 world time cities
App information
Time & place
Mission log
Location Indicator
Location Memory
Mode/Display switching customization
Auto altitude correction
Phone finder
Exterior
Glass
Sapphire crystal with anti-reflective coating
Crown
Screw Lock Crown
Surface Treatment
DLC-treated stainless steel
Gold ion plated bezel
Compatible Band Size
145 to 215 mm
Other
Neobrite
Watch Features
World Time
World time
38 time zones (55 cities + coordinated universal time), daylight saving on/off, auto summer time (DST) switching, Home city/World time city swapping
Sunrise / Sunset Display
Sunrise time and sunset time for specific date
Stopwatch
1/100-second stopwatch
Measuring capacity: 23:59'59.99''
Measuring modes: Elapsed time, split time, 1st-2nd place times
Timer
Countdown timer
Measuring unit: 1 second
Countdown range: 60 minutes
Countdown start time setting range: 1 minute to 60 minutes (1-minute increments)
Alarm / Hourly Time Signal
5 daily alarms
Hourly time signal
Light
Double LED light
LED light for the face (Full auto LED light, Super illuminator, selectable illumination duration (1.5 seconds or 3 seconds), afterglow)
LED backlight for the digital display (Full auto LED light, Super illuminator, selectable illumination duration (1.5 seconds or 3 seconds), afterglow)
Light color
LED:White
Calendar
Full auto-calendar (to year 2099)
Mute feature
Button operation tone on/off
Hand home position correction feature
The auto hand home position correction
Energy saving feature
Power Saving (display goes blank and hands stop to save power when the watch is left in the dark)
Battery display/alert
Battery level indicator/p>
Run time
Approx. battery operating time:
- 6 months on rechargeable battery (operation period with normal use without exposure to light after charge)
- 24 months on rechargeable battery (operation period when stored in total darkness with the power save function on after full charge)
Run time
Accuracy
- Accuracy: ±15 seconds per month (with no signal calibration and mobile link function)
Other features
- 12/24-hour format
- Hand shift feature (Hands move out of the way to provide an unobstructed view of digital display contents.)
- Regular timekeeping:
- Analog: 3 hands (hour, minute (hand moves every 10 seconds), second)
- 2 dials
- Digital: Hour, minute, second, pm, month, date, day
Time adjustment details
Time Calibration Signals
Station name: DCF77 (Mainflingen, Germany)
Frequency: 77.5 kHz
Station name: MSF (Anthorn, England)
Frequency: 60.0 kHz
Station name: WWVB (Fort Collins, United States)
Frequency: 60.0 kHz
Station name: JJY (Fukushima, Fukuoka/Saga, Japan)
Frequency: 40.0 kHz (Fukushima) / 60.0 kHz (Fukuoka/Saga)
Station name: BPC (Shangqiu City, Henan Province, China)
Frequency: 68.5 kHz
Time calibration signal reception
Auto receive up to six* times a day (remaining auto receives canceled as soon as one is successful)
*5 times a day for the Chinese calibration signal
Manual receive
The latest signal reception results
Drawing inspiration from the immense power and captivating beauty of the natural world, the Magma Gold MUDMASTER elevates G-SHOCK's flagship MASTER OF G series with a bold expression of toughness and craftsmanship.
Designed to withstand the harshest environments, the GWG-B1000MG features a high-precision forged metal shield exterior paired with G-SHOCK's advanced Carbon Core Guard structure. Its more compact profile offers enhanced comfort without compromising durability, while the combination of lightweight carbon fiber-reinforced resin and robust metal components delivers exceptional resistance against shock, mud, and extreme conditions.
The watch's striking design captures the dramatic essence of molten lava. Vibrant red and orange accents on the hands and indexes evoke the fiery glow of flowing magma, while layered gold ion-plated components mirror the rich golden tones formed as lava cools and solidifies. A marbled resin band, created through a unique color-molding process, reflects the depth and texture of the Earth's geological layers, ensuring that each timepiece possesses its own distinctive character.
Crafted with bio-based resin, the Magma Gold MUDMASTER combines rugged performance with a more environmentally conscious approach to watchmaking, embodying G-SHOCK's philosophy of "beauty in toughness."
Built for serious adventurers, the watch is radio-controlled and solar-powered, and equipped with Triple Sensor technology that provides real-time direction, altitude, barometric pressure, and temperature readings. Double LED illumination and a scratch-resistant sapphire crystal ensure optimal visibility in any environment.
For added confidence in challenging terrain, the Location Indicator function works with the companion app to point toward a pre-set destination using the indicator hand at the 3 o'clock position, helping wearers stay on course even in low-visibility conditions such as sandstorms or dense wilderness.
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