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Europe, UK: Saturday, Feb 21 ~
USA: Thursday, Feb 19 ~
Australia: Saturday, Feb 21 ~
Asia: Friday, Feb 20 ~
UAE: Saturday, Feb 21 ~
Order within 6 Hours 58 mins with Scheduled Delivery. If you place an order within this time, We will ship Thursday, Feb 19 2026. This delivery time is calculated by DHL and FedEx. You can check the exact delivery date on checkout page.
USA: Thursday, Feb 19 ~
Australia: Saturday, Feb 21 ~
Asia: Friday, Feb 20 ~
UAE: Saturday, Feb 21 ~
Order within 6 Hours 58 mins with Scheduled Delivery. If you place an order within this time, We will ship Thursday, Feb 19 2026. This delivery time is calculated by DHL and FedEx. You can check the exact delivery date on checkout page.
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From G-SHOCK, which has been pursuing toughness since its launch in 1983, comes the MASTER OF G MUDMASTER, featuring a highly durable metal bezel.
MASTER OF G is a line of G-SHOCK watches that has been enhanced for professionals with tough functionality that can withstand the harshest conditions.
Among them, MUDMASTER is a tough watch designed for use in harsh environments where rubble and earth and sand are piled up and scattered, and has earned high praise and trust from rangers and rescue teams who work in extreme environments.
The GG-B100XMB-1AJF features a stainless steel mirror-finish bezel with black IP coating, providing high scratch resistance and a sophisticated, glossy finish.
The GG-B100XM-1AJF features a honed silver stainless steel bezel that is resistant to dirt and dust, and a matte finish that reduces light reflection for a calm look.
The case is made of highly rigid carbon fiber reinforced resin, which reduces breakage and deformation and ensures high airtightness and impact resistance.
In addition, it is equipped with a filter to prevent mud from entering, a stainless steel panel back, and an impact-resistant glass fiber reinforced resin back cover, providing high dust and mud resistance.
In terms of functionality, it can measure direction, altitude/barometric pressure, temperature, and steps.
In addition to easy watch settings using the dedicated app, it also comes equipped with several useful functions, such as a mission log that automatically records the altitude obtained from the watch and the route obtained from a smartphone in the app.
This is a tough watch that supports quick decisions and precise actions.
* Biomass plastic is used for the main resin parts of the case and band.
It uses renewable organic resources as raw materials and is expected to contribute to reducing environmental impact.
- Shock-resistant structure.
? Dustproof/mudproof structure.
? 20 ATM water resistance.
- Mobile link function (function linkage via Bluetooth? communication with compatible mobile phones).
- Hand retraction function (When the hands overlap the LCD display and are difficult to see, you can temporarily retract the hands from above the LCD display).
? Azimuth measurement function: Measures 16 azimuths and azimuth angles (0 to 359?),.
continuous azimuth measurement (60 seconds),.
north direction pointer function, magnetic declination correction function, azimuth correction function (2-point correction/figure-eight correction/automatic correction).
Barometric pressure measurement function (measurement range: 260 to 1,100 hPa),.
barometric pressure trend graph (displays the past 20 or 56 hours),.
barometric pressure difference indicator (? 10 hPa),.
barometric pressure trend information alarm (notifies you with an arrow and sound when a significant change in barometric pressure occurs)
* The barometric pressure trend graph can be changed to display the past 20 or 56 minutes.
The pressure difference indicator will be displayed in units of ?0.1 hPa.
Altitude measurement function/relative altimeter (measurement range: -700 to 10,000 m),.
altitude memory (manual memory for up to 14 records of measurement date, time, and altitude, automatically recorded data: maximum/minimum altitude, auto-accumulation (ascent/descent) memory),.
altitude trend graph, altitude difference indicator (?100 m/?1000 m),.
measurement interval setting function (every 5 seconds/2 minutes)
* Every 1 second for the first 3 minutes only.
- Temperature measurement function (measurement range: -10 to 60?C).
- Step counting function: Step counting using a 3-axis acceleration sensor, step count display range (0 to 999,999 steps).
- Power saving function (automatically puts the sensor into sleep mode to save power if there is no movement for a certain period of time).
- Sunrise and sunset time display.
World time: 38 cities (38 time zones, daylight saving time and current time city swap function).
Stopwatch (1/100 second (less than 1 hour) / 1 second (more than 1 hour),.
24 hour counter, with split).
- Timer (set unit: 1 minute, maximum set: 24 hours, measured in 1-second increments).
? 5 time alarms ?Time signal.
- Fully automatic calendar.
? 12/24 hour display switching.
- Operation sound ON/OFF switching function.
Double LED light: LED light for the dial (with auto light, Super Illuminator, afterglow function, selectable afterglow time (1.5 seconds/3 seconds)),.
LED backlight for the LCD (with auto light, Super Illuminator, afterglow function, selectable afterglow time (1.5 seconds/3 seconds)).
Model Number: GG-B100XM-1AJF
Tags:
MASTER OF G is a line of G-SHOCK watches that has been enhanced for professionals with tough functionality that can withstand the harshest conditions.
Among them, MUDMASTER is a tough watch designed for use in harsh environments where rubble and earth and sand are piled up and scattered, and has earned high praise and trust from rangers and rescue teams who work in extreme environments.
The GG-B100XMB-1AJF features a stainless steel mirror-finish bezel with black IP coating, providing high scratch resistance and a sophisticated, glossy finish.
The GG-B100XM-1AJF features a honed silver stainless steel bezel that is resistant to dirt and dust, and a matte finish that reduces light reflection for a calm look.
The case is made of highly rigid carbon fiber reinforced resin, which reduces breakage and deformation and ensures high airtightness and impact resistance.
In addition, it is equipped with a filter to prevent mud from entering, a stainless steel panel back, and an impact-resistant glass fiber reinforced resin back cover, providing high dust and mud resistance.
In terms of functionality, it can measure direction, altitude/barometric pressure, temperature, and steps.
In addition to easy watch settings using the dedicated app, it also comes equipped with several useful functions, such as a mission log that automatically records the altitude obtained from the watch and the route obtained from a smartphone in the app.
This is a tough watch that supports quick decisions and precise actions.
* Biomass plastic is used for the main resin parts of the case and band.
It uses renewable organic resources as raw materials and is expected to contribute to reducing environmental impact.
- Shock-resistant structure.
? Dustproof/mudproof structure.
? 20 ATM water resistance.
- Mobile link function (function linkage via Bluetooth? communication with compatible mobile phones).
- Hand retraction function (When the hands overlap the LCD display and are difficult to see, you can temporarily retract the hands from above the LCD display).
? Azimuth measurement function: Measures 16 azimuths and azimuth angles (0 to 359?),.
continuous azimuth measurement (60 seconds),.
north direction pointer function, magnetic declination correction function, azimuth correction function (2-point correction/figure-eight correction/automatic correction).
Barometric pressure measurement function (measurement range: 260 to 1,100 hPa),.
barometric pressure trend graph (displays the past 20 or 56 hours),.
barometric pressure difference indicator (? 10 hPa),.
barometric pressure trend information alarm (notifies you with an arrow and sound when a significant change in barometric pressure occurs)
* The barometric pressure trend graph can be changed to display the past 20 or 56 minutes.
The pressure difference indicator will be displayed in units of ?0.1 hPa.
Altitude measurement function/relative altimeter (measurement range: -700 to 10,000 m),.
altitude memory (manual memory for up to 14 records of measurement date, time, and altitude, automatically recorded data: maximum/minimum altitude, auto-accumulation (ascent/descent) memory),.
altitude trend graph, altitude difference indicator (?100 m/?1000 m),.
measurement interval setting function (every 5 seconds/2 minutes)
* Every 1 second for the first 3 minutes only.
- Temperature measurement function (measurement range: -10 to 60?C).
- Step counting function: Step counting using a 3-axis acceleration sensor, step count display range (0 to 999,999 steps).
- Power saving function (automatically puts the sensor into sleep mode to save power if there is no movement for a certain period of time).
- Sunrise and sunset time display.
World time: 38 cities (38 time zones, daylight saving time and current time city swap function).
Stopwatch (1/100 second (less than 1 hour) / 1 second (more than 1 hour),.
24 hour counter, with split).
- Timer (set unit: 1 minute, maximum set: 24 hours, measured in 1-second increments).
? 5 time alarms ?Time signal.
- Fully automatic calendar.
? 12/24 hour display switching.
- Operation sound ON/OFF switching function.
Double LED light: LED light for the dial (with auto light, Super Illuminator, afterglow function, selectable afterglow time (1.5 seconds/3 seconds)),.
LED backlight for the LCD (with auto light, Super Illuminator, afterglow function, selectable afterglow time (1.5 seconds/3 seconds)).
Model Number: GG-B100XM-1AJF
Tags:
Casio Casio G-Shock Master of G Mudmaster Silver CASIO MensWatch BlackWatch GShock ToughWatch JapaneseModel Mudmaster
