Description
CASIO G-SHOCK GWG-B1000-1A3JF MUDMASTER
The GWG-B1000-1A3JF combines tan utility accents, a black exterior and a matte olive green resin band. Part of the MASTER OF G - LAND MUDMASTER series, this Japanese Domestic Market model brings together Tough Solar power, MULTIBAND 6 radio-controlled timekeeping, Bluetooth smartphone connectivity and Triple Sensor functions.
Tan Accents and Olive Green Band
Utility-inspired design: Tan dial components and bezel markings contrast with the different black finishes of the multi-part exterior. The matte olive green band completes the restrained field-equipment-inspired color scheme. Analog hands are paired with a negative LCD for digital information.
Solar Radio-Controlled Performance
Three complementary technologies: Tough Solar generates power from light, while MULTIBAND 6 and Bluetooth smartphone connectivity provide automatic time adjustment. Compatible standard time signals are transmitted from Japan, China, the United States, Germany and the United Kingdom. Reception depends on location, conditions and home-city settings.
From a full charge without further light exposure, operating time is approximately 6 months with normal function use or approximately 24 months with power saving activated. Accuracy without radio reception or smartphone connection is ±15 seconds per month.
Triple Sensor and Smartphone Link
Environmental measurements: Triple Sensor provides compass bearing, altitude, barometric pressure and temperature readings. The compass includes automatic horizontal compensation and bearing memory, while the barometer offers a pressure trend graph and a pressure-change alarm.
With a compatible smartphone and the CASIO WATCHES app, connected functions include Mission Log, Location Memory, Location Indicator and automatic altitude correction. Mission Log combines altitude data from the watch with route information obtained through the smartphone's GPS. Location Indicator displays the direction and distance to a recorded or selected destination. Destination selection in the app is not available in China.
Measurement guidance: The altimeter calculates relative altitude from air pressure, so weather-related pressure changes can affect readings. For ambient temperature measurements, remove the watch from your wrist and avoid the effects of body heat, moisture and direct sunlight.
Carbon Core Guard and Protective Construction
Multi-material protection: Stainless-steel components and carbon-fiber-reinforced resin form the protective exterior. Carbon Core Guard construction protects the module, while gasket-equipped button shafts and a screw-lock crown help prevent dust and mud from entering. Vibration-resistant construction adds protection for demanding environments.
The watch features sapphire crystal with an internal anti-reflective coating and 20 bar water resistance. Bio-based resin is used in the main resin components of the bezel, case and band.
Visibility and Practical Functions
Neobrite luminous elements and a white full-auto double LED Super Illuminator support visibility in low light. Hand shift moves the hands away from the digital display when required. Additional functions include world time, sunrise and sunset times, a stopwatch, a countdown timer and five daily alarms.
Japanese Domestic Market Model
Japan-market reference: GWG-B1000-1A3JF is the Japanese Domestic Market reference. This model is made in Japan. Its market designation and country of manufacture are separate specifications.
Key Highlights
- Black exterior with tan accents and a matte olive green resin band
- Tough Solar, MULTIBAND 6 and Bluetooth smartphone connectivity
- Triple Sensor for compass, altitude, barometric pressure and temperature
- Shock-, vibration-, dust- and mud-resistant construction
- Carbon Core Guard structure and anti-reflective sapphire crystal
- Analog-digital display with negative LCD and double LED illumination
Product Specifications
| Brand / Collection | CASIO G-SHOCK |
|---|---|
| Series | MASTER OF G - LAND / MUDMASTER |
| Model | GWG-B1000-1A3JF |
| Market | Japanese Domestic Market |
| Country of Manufacture | Japan |
| Watch Type | Men's watch |
| Display | Analog-digital with negative LCD |
| Dial / Exterior | Black with tan dial components and bezel markings |
| Case Dimensions | 58.7 × 52.1 × 16.2 mm (length × width × thickness) |
| Weight | 114 g |
| Case / Bezel Materials | Resin and stainless steel; carbon-fiber-reinforced resin case with Carbon Core Guard structure; bio-based resin used in main resin components |
| Surface Treatments | DLC treatment on stainless-steel parts; black ion plating on bezel parts |
| Crystal | Sapphire crystal with internal anti-reflective coating |
| Crown | Screw-lock crown |
| Band | Matte olive green resin band with bio-based resin |
| Compatible Wrist Size | 145–215 mm |
| Movement Type | Tough Solar solar-powered quartz |
| Module | 5713 |
| Operating Time | Approximately 6 months with normal function use; approximately 24 months with power saving, from a full charge without further light exposure |
| Accuracy | ±15 seconds per month without radio reception or smartphone connection |
| Radio Reception | MULTIBAND 6: standard time signals from Japan, China, the United States, Germany and the United Kingdom; automatic and manual reception, subject to reception conditions and home-city settings |
| Smartphone Link | Bluetooth connectivity with a compatible smartphone using CASIO WATCHES |
| Connected Functions | Automatic time adjustment, watch settings, approximately 300 world-time cities, Mission Log, Location Memory, Location Indicator, automatic altitude correction, mode customization and phone finder; app destination selection unavailable in China |
| Compass | 0–359° bearing measurement; 16 directions; 60-second continuous measurement; north indication; bearing memory; automatic horizontal compensation |
| Altimeter | Relative altitude from −700 to 10,000 m in 1 m increments; 30 manual records; altitude trend graph and ascent/descent accumulation |
| Barometer | 260–1,100 hPa; pressure trend graph; pressure difference indicator; pressure-change alarm |
| Thermometer | −10 to 60°C in 0.1°C increments |
| World Time | 55 cities across 38 time zones plus UTC; daylight saving time setting; home/world-time city swap; direct UTC recall |
| Stopwatch / Timer | 1/100-second stopwatch with 24-hour capacity and split time; countdown timer adjustable up to 60 minutes in 1-minute increments |
| Alarms | Five daily alarms and hourly time signal |
| Light / Luminescence | White full-auto double LED Super Illuminator with selectable 1.5- or 3-second afterglow; Neobrite |
| Additional Functions | Sunrise/sunset times; full-auto calendar; 12/24-hour format; automatic hand-position correction; hand shift; button-tone on/off; battery level indicator |
| Protective Construction | Shock-resistant, vibration-resistant, dust- and mud-resistant construction |
| Water Resistance | 20 bar water resistance |
| Release Period | September 2026 (Japan) |
| JAN Code | 4549526431142 |