G-SHOCK GG-B100XMH-5A – MUDMASTER Horizon Gold Analog-Digital Watch
The G-SHOCK GG-B100XMH-5A is a rugged gold and brown MUDMASTER analog-digital watch from the MASTER OF G – LAND collection. Part of the MASTER IN HORIZON GOLD lineup, this model draws inspiration from the golden horizon where earth meets sky. Combining refined metallic accents with G-SHOCK's legendary durability, it features a light yellow gold ion-plated stainless steel bezel, a dark brown bio-based resin band, Carbon Core Guard construction, mud resistance, and 200-meter water resistance.
Designed for demanding outdoor environments, the GG-B100XMH-5A incorporates a digital compass, altimeter, barometer, thermometer, and step counter. Bluetooth connectivity with the CASIO WATCHES app adds automatic time adjustment, Mission Log, and other practical features for everyday use and outdoor exploration.
Design Overview
The GG-B100XMH-5A combines a striking light yellow gold bezel with brown ion-plated metal accents and a dark brown resin band. The layered analog-digital dial features prominent hands, dimensional indexes, and digital displays, creating the distinctive appearance of a G-SHOCK MUDMASTER while keeping important information accessible.
The design belongs to the MASTER IN HORIZON GOLD collection, which celebrates the colors and atmosphere of the horizon where the earth meets the sky. Its metallic details introduce a refined appearance to the functional MUDMASTER design, making the watch suitable for both outdoor adventures and everyday wear.
Beneath its distinctive exterior, a carbon fiber-reinforced resin case provides structural strength. Protective components, including a filter designed to resist mud intrusion and a reinforced back cover, help the watch perform in dusty and muddy conditions.
Key Features
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G-SHOCK MASTER OF G – LAND MUDMASTER analog-digital watch
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MASTER IN HORIZON GOLD collection design
- Light yellow gold ion-plated stainless steel bezel
- Brown ion-plated metal accents
- Dark brown bio-based resin band
- Carbon Core Guard structure
- Carbon fiber-reinforced resin case
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Shock Resistant construction
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Mud Resistant construction
- 200-meter water resistance
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Quad Sensor technology incorporating direction, pressure, temperature, and acceleration sensing
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Digital compass with directional measurements
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Altimeter for altitude measurements
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Barometer for atmospheric pressure monitoring
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Thermometer for temperature measurements
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Step counter using a 3-axis acceleration sensor
- Bluetooth Smartphone Link
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CASIO WATCHES app compatibility
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Automatic time adjustment through smartphone connection
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Mission Log for recording altitude and smartphone route information
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Location Indicator and Location Memory through app connectivity
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World time: 38 time zones
- Sunrise and sunset time display
- 1/100-second stopwatch
- 24-hour countdown timer
- 5 daily alarms
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Double LED Super Illuminator with white illumination
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Full auto-calendar to year 2099
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Neobrite luminous coating
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Approx. 2-year battery life on CR2025
Case & Exterior
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Case / Bezel Material: Bio-based carbon / Stainless steel
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Case Construction: Carbon fiber-reinforced resin
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Bezel Material: Stainless steel
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Bezel Finish: Light yellow gold ion plating
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Metal Accents: Brown ion plating
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Band: Bio-based resin band
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Band Color: Dark brown
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Display: Analog-digital
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Glass: Mineral Glass / Spherical Glass
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Compatible Band Size: 145 – 215 mm
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Weight: 104 g
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Construction: Shock Resistant / Mud Resistant / Carbon Core Guard
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Other: Neobrite
Case Dimensions
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Case Size (L × W × H): 55.4 × 51.3 × 19.4 mm
Movement & Accuracy
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Display Type: Analog-digital
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Analog Timekeeping: 3 hands (hour, minute, second)
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Minute Hand Movement: Every 10 seconds
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Digital Timekeeping: Hour, minute, second, AM/PM, month, date, and day
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Time Adjustment: Bluetooth smartphone connection with automatic time adjustment
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Accuracy Without Mobile Link: ±15 seconds per month
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Power Supply: CR2025 battery
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Battery Life: Approx. 2 years
Innovative Technology
Carbon Core Guard Structure
The G-SHOCK GG-B100XMH-5A incorporates a Carbon Core Guard structure designed to provide strength and shock resistance while controlling the overall weight of the watch.
Its carbon fiber-reinforced resin case helps protect the internal components from shocks, while the combination of carbon-based materials and stainless steel delivers the durability expected from the MUDMASTER collection.
Despite its substantial case dimensions and metal bezel, the GG-B100XMH-5A weighs 104 grams.
Mud Resistant Construction
The MUDMASTER GG-B100XMH-5A is designed for environments where dust, dirt, and mud are common.
A protective filter helps prevent mud from entering the case, while reinforced components surrounding the case back contribute to the watch's durability. Its Shock Resistant and Mud Resistant construction makes it a practical option for outdoor activities and demanding working conditions.
Quad Sensor Technology
The GG-B100XMH-5A features Quad Sensor technology, combining outdoor environmental measurements with movement tracking.
The watch provides access to a digital compass, altimeter, barometer, thermometer, and step counter, allowing the wearer to monitor direction, altitude, atmospheric pressure, temperature, and daily activity from the wrist.
Digital Compass
The integrated digital compass measures direction and displays compass bearings to support orientation during outdoor activities.
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Direction Display: 16 points
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Measuring Range: 0° – 359°
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Measuring Unit: 1°
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Continuous Measurement: 60 seconds
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Additional Features: Magnetic declination correction and direction calibration
Altimeter
The altimeter measures relative altitude using atmospheric pressure data, providing useful information during hiking and other outdoor activities.
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Measuring Range: -700 to 10,000 m (-2,300 to 32,800 ft)
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Measuring Unit: 1 m (5 ft)
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Altitude Differential: Hand indication
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Manual Memory: Up to 14 measurement records
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Auto Log Data: High/low altitude and cumulative ascent/descent
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Units: Meters or feet
Barometer
The barometer monitors atmospheric pressure and displays changes over time. A pressure tendency graph and pressure change alert help the wearer recognize significant changes in atmospheric conditions.
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Measuring Range: 260 – 1,100 hPa
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Measuring Unit: 1 hPa
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Atmospheric Pressure Tendency Graph: Available
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Pressure Differential Indication: Available
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Barometric Pressure Tendency Information Alarm: Available
Thermometer
The built-in thermometer allows temperature readings directly from the watch.
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Measuring Range: -10°C to 60°C (14°F to 140°F)
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Measuring Unit: 0.1°C (0.2°F)
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Units: Celsius or Fahrenheit
For a more accurate ambient temperature reading, remove the watch from your wrist and allow its temperature to stabilize, as body heat can affect measurements.
Step Counter
The GG-B100XMH-5A incorporates a step counter using a 3-axis acceleration sensor.
The watch can display step counts from 0 to 999,999 steps and includes a power-saving function that puts the sensor into a sleep state after a period of inactivity.
Bluetooth & CASIO WATCHES App
The G-SHOCK GG-B100XMH-5A supports Bluetooth Smartphone Link through the official CASIO WATCHES app.
Connecting the watch to a compatible smartphone provides access to convenient functions, including automatic time adjustment, easy watch settings, and outdoor activity-related features.
App Connectivity Features
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Auto Time Adjustment: Synchronizes the watch's time through smartphone connectivity
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Easy Watch Setting: Adjust watch settings through the CASIO WATCHES app
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World Time: Access to approximately 300 cities through the app
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Life Log Data: Review activity-related information
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Mission Log: Records watch altitude data together with route data obtained from a connected smartphone
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Location Indicator: Helps indicate the direction toward a recorded location
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Location Memory: Saves location information through app connectivity
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Auto Altitude Correction: Supports altitude measurement correction through the app
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Mode / Display Switching Customization: Customize supported display and mode settings
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Phone Finder: Helps locate a paired smartphone
Mission Log
The Mission Log feature combines altitude information obtained from the watch with route information recorded by a connected smartphone.
This feature allows users to review information about their outdoor journeys through the CASIO WATCHES app. Route recording relies on data from the connected smartphone.
Functions
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Regular Timekeeping: Analog and digital display
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Analog Display: Hour, minute, and second hands
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Digital Display: Hour, minute, second, AM/PM, month, date, and day
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12/24-Hour Format: Available
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Digital Compass: 16-point direction display
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Altimeter: -700 to 10,000 m measuring range
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Barometer: 260 to 1,100 hPa measuring range
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Thermometer: -10°C to 60°C measuring range
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Step Counter: 3-axis acceleration sensor
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World Time: 38 time zones (38 cities plus UTC)
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Daylight Saving Time: On/off
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Home City / World Time City Swapping: Available
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Sunrise / Sunset: Sunrise and sunset times for a selected date
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Stopwatch: 1/100-second stopwatch
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Stopwatch Capacity: Up to 23 hours, 59 minutes, 59 seconds
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Stopwatch Modes: Elapsed time, split time, and 1st–2nd place times
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Countdown Timer: Up to 24 hours
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Daily Alarms: 5
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Hourly Time Signal: Available
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Light: Double LED Super Illuminator
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Light Color: White
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Afterglow: Available
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Auto LED Light: Available
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Illumination Duration: Selectable 1.5 or 3 seconds
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Calendar: Full auto-calendar to year 2099
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Hand Shift Feature: Moves analog hands to improve visibility of digital display contents
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Mute Feature: Button operation tone on/off
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Accuracy Without Mobile Link: ±15 seconds per month
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Bluetooth: Smartphone Link with automatic time adjustment
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Compatible App: CASIO WATCHES
Water Resistance & Durability
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Water Resistance: 200 meters (20 BAR)
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Shock Resistance: Shock Resistant construction
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Mud Resistance: Mud Resistant construction
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Case Protection: Carbon Core Guard structure
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Case Material: Carbon fiber-reinforced resin with stainless steel components
G-SHOCK GG-B100XMH-5A – Frequently Asked Questions
What is the G-SHOCK GG-B100XMH-5A?
The GG-B100XMH-5A is a G-SHOCK MUDMASTER analog-digital watch from the MASTER OF G – LAND collection. It belongs to the MASTER IN HORIZON GOLD lineup and features a gold ion-plated stainless steel bezel, a dark brown resin band, shock resistance, mud resistance, 200-meter water resistance, and multiple outdoor sensors.
What is the MASTER IN HORIZON GOLD collection?
The MASTER IN HORIZON GOLD collection takes inspiration from the golden horizon where earth meets sky. The GG-B100XMH-5A expresses this concept through a light yellow gold ion-plated bezel, brown metal accents, and a dark brown resin band.
Is the G-SHOCK GG-B100XMH-5A analog or digital?
The GG-B100XMH-5A is an analog-digital watch. It combines traditional hour, minute, and second hands with digital displays that present timekeeping and sensor information.
What sensors does the GG-B100XMH-5A have?
The GG-B100XMH-5A features a digital compass, altimeter, barometer, thermometer, and step counter. Its Quad Sensor system combines directional, atmospheric pressure, temperature, and acceleration measurements to support outdoor activities.
Does the GG-B100XMH-5A connect to a smartphone?
Yes. The GG-B100XMH-5A supports Bluetooth Smartphone Link through the CASIO WATCHES app. Available features include automatic time adjustment, easy watch settings, Mission Log, Location Indicator, Location Memory, and Phone Finder.
Does the GG-B100XMH-5A have GPS?
The watch's Mission Log uses altitude information measured by the watch together with route information obtained from a connected smartphone. Its documented route-recording function therefore relies on smartphone location data rather than standalone GPS route recording by the watch.
Is the G-SHOCK GG-B100XMH-5A solar powered?
No solar charging function is listed in the model's official individual specifications. The GG-B100XMH-5A uses a CR2025 battery with an approximate battery life of 2 years.
Is the GG-B100XMH-5A mud resistant?
Yes. The GG-B100XMH-5A features Mud Resistant construction, including protective components designed to help prevent mud intrusion. Its Carbon Core Guard structure also supports shock-resistant performance in demanding environments.
Is the G-SHOCK GG-B100XMH-5A water resistant?
Yes. The GG-B100XMH-5A offers 200-meter water resistance (20 BAR), together with shock-resistant and mud-resistant construction.
How much does the GG-B100XMH-5A weigh?
The GG-B100XMH-5A weighs 104 grams. Its carbon fiber-reinforced resin construction combines structural strength with a durable design.
What is the case size of the G-SHOCK GG-B100XMH-5A?
The GG-B100XMH-5A measures 55.4 × 51.3 × 19.4 mm (length × width × height). Its compatible band size is 145–215 mm.
Does the GG-B100XMH-5A have world time?
Yes. The GG-B100XMH-5A offers world time across 38 time zones, including 38 cities plus UTC. The CASIO WATCHES app also supports world time settings for approximately 300 cities.
Does the GG-B100XMH-5A have a stopwatch and timer?
Yes. The watch includes a 1/100-second stopwatch with elapsed, split, and 1st–2nd place measurement modes. It also has a countdown timer with a maximum setting of 24 hours.
Does the GG-B100XMH-5A have an LED light?
Yes. The GG-B100XMH-5A features a white Double LED Super Illuminator for both the analog face and digital display. It includes automatic illumination, afterglow, and selectable illumination duration.
What battery does the GG-B100XMH-5A use?
The G-SHOCK GG-B100XMH-5A uses a CR2025 battery with an approximate battery life of 2 years.
What is the difference between MUDMASTER and other G-SHOCK watches?
The MUDMASTER collection focuses on rugged construction for environments where dirt, dust, and mud may be present. The GG-B100XMH-5A adds specialized outdoor functions, including direction, altitude, atmospheric pressure, temperature, and step measurements, alongside G-SHOCK's shock resistance and 200-meter water resistance.
Summary
The G-SHOCK GG-B100XMH-5A is a distinctive gold and brown MUDMASTER analog-digital watch from the MASTER OF G – LAND collection. Inspired by the golden horizon, its light yellow gold ion-plated stainless steel bezel, brown metal accents, and dark brown bio-based resin band create a sophisticated interpretation of G-SHOCK's rugged outdoor design.
Featuring Carbon Core Guard construction, mud resistance, 200-meter water resistance, Quad Sensor technology, Bluetooth Smartphone Link, and CASIO WATCHES app connectivity, the GG-B100XMH-5A combines outdoor functionality with distinctive styling.
For those seeking a G-SHOCK MUDMASTER watch with a compass, altimeter, barometer, thermometer, and step counter, the GG-B100XMH-5A delivers practical features in an eye-catching Horizon Gold design.
For more details, visit the official CASIO GG-B100XMH-5A product page.
Warranty
All G-SHOCK watches purchased from Miseki Jewelry include a 1-year limited warranty covering manufacturing defects in the watch movement only, starting from the date of purchase.
Warranty Exclusions: This movement-only warranty does not cover the battery, case, glass, band, normal wear and tear, accidental damage, or damage caused by improper use. Proof of purchase is required for warranty claims.
This is Miseki Jewelry's movement-only limited warranty and is separate from any applicable CASIO manufacturer's warranty.
▶︎ Processing Time & Shipping Policy
▶︎ Refund Policy
We only carry G-SHOCK USA products.
Unfortunately, we DO NOT ship internationally.
