*The color tone of the listed products may differ from the actual product in some cases.
GWG-B1000-1A4ER
The tactical powerhouse that needs no introduction, the MUDMASTER range has been a firm favourite of adventurers, military operatives and G-SHOCK fans since its first release in 2015. The GWG-B1000 is now issued with Bluetooth built in as standard together with Mission Log & Location Indicator modes. Essential when exploring new areas the watch works in unison with the CASIO WATCHES APP. MISSION READY Representing the premium line of MASTER OF G the new B1000 evokes a high grade finish with a new steel bezel, diamond carbon shock absorbers and bio-based carbon fibre guard structure. ADVENTURE PROOF As the name suggests the MUDMASTERs renowned environment resistance is back and stronger than ever. Regardless of the terrain or materials the watch is exposed to it will continue to operate and function. A patented gasket system, 200m water resistance and ultra-reliable solar power ensure your MUDMASTER can go where you go. A built in Barometer monitors incoming weather fronts and alerts of sudden drops in pressure to get cover before storms. Thermometer & sun rise/set modes work alongside the watches triple sensor to keep you up to date on your surroundings.
Features
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Shock resistant
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Resistant to mud
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20 bar water resistant
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Made in Japan
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Stable solar power
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Easy to operate via smartphone
Specifications
Feature
Tough design inspired by professional gear
Inspired by the adventurous spirit exemplified by tearing across the wastelands in “overlanding” style, the design incorporates the solid, rugged look of offroad vehicles and survival gear. With the multi-dimensional form of the multi-component structure, the large-diameter dial, and oversized buttons, the chronograph delivers durability, operability, and readability, with exterior design combining practicality with aesthetic appeal.
Guard structure integrating components made with different materials
The timepiece employs a newly developed guard structure that combines components made with different materials: stainless steel for the bezel ring, upper and lower bezel guards, and front button guard, and carbon fibre-reinforced resin* for left and right side button guards. For the bezel guards, the guard sections alone are cut out of components forged into bezel shapes. The complex moulded form of the front button guard is achieved with a high degree of precision using metal injection moulding (MIM). A diamond-like carbon (DLC) coating is applied to the materials’ surfaces to provide even greater abrasion resistance.
*Due to the characteristics of carbon fiber-reinforced resin, the pattern and color tone that appears on the surface will vary model by model.
Dust- and mud-resistance plus vibration resistance, to withstand use in the harshest conditions
The buttons are protected by cylindrical stainless-steel parts, and the button shafts are equipped with gasket fittings. The crown features a screw-lock construction to prevent contamination with mud and dust. Also, the sides and underside of the module incorporate αGEL to ensure vibration resistance.
*αGEL is a registered trademark of Taica Corporation in Japan and other countries.

Triple Sensor to stay on top of changing conditions
Includes a pair of compasses, an altimeter/barometer, and a thermometer. The second 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.
Digital Compass
60-second continuous direction measurement.
Includes auto horizontal compensation.

Thermometer
Measures the temperature at the current location.*
Measures the temperature at the current location.*

*When measuring the ambient temperature, be sure the watch is removed from the wrist to avoid interference from body temperature, perspiration (water droplets), direct sunlight, and other external factors.
Barometer
Sudden atmospheric pressure change alarm.
Sudden atmospheric pressure change alarm.

Altimeter
Altitude measurement interval 1 sec.*
Measurement unit 1 m.

*Takes measurements every second for the first 3 minutes and every 5 seconds or 2 minutes thereafter(selectable).

DETAIL1
Carbon Core Guard structure
A carbon fibre-reinforced resin case* protects the module, making the most of the high degree of strength and outstanding durability delivered by the carbon material to achieve a size ensuring a comfortable fit.
*Due to the characteristics of carbon fiber-reinforced resin, the pattern and color tone that appears on the surface will vary model by model.

DETAIL2
Attention to materials: Bio-based resin
Key resin components of the bezel, case, and band are made with bio-based resins. Produced using renewable organic resources, the material is expected to help reduce environmental impact.
*Graphic is included for illustrative purposes.

DETAIL3
Solar-powered timekeeping with Bluetooth® and radio control for enhanced accuracy and reliability

DETAIL4
Super Illuminator (high-brightness full-auto double LED light) for maintaining watch readability in the dark
*Image shows the GWG-B1000-1A.

DETAIL5
Scratch-resistant, highly transparent sapphire crystal with an anti-reflective coating