CASIO G-SHOCK GG-B100X-1A3DR MUDMASTER MASTER OF G ANALOG-DIGITAL BLACK GREEN WATCH

The GG-B100X-1A3DR is the green-accented variant of the Mudmaster — the same carbon fiber-reinforced, mud-resistant, Quad Sensor-equipped Master of G tool watch, with green accent details on the dial, hands, and case markings against the black carbon body. The green references military field equipment and jungle terrain — a natural pairing for a watch designed to work in exactly those environments. Where the -1A is full stealth black and the -1A9 uses high-vis orange, the -1A3 sits in the middle: visible enough to read quickly, subdued enough to blend with outdoor and military gear.

Module 5744 and every specification are identical across all three variants: Quad Sensor (digital compass with hand indication of north, altimeter up to 10,000 metres with auto logging, barometer with pressure tendency alarm, thermometer, and step counter via 3-axis accelerometer), Bluetooth smartphone link with Mission Log, Carbon Core Guard with carbon fiber-reinforced bio-based resin case, mud-resistant sealed buttons, three-layer carbon fiber bezel, stainless steel panel back, double LED Super Illuminator, world time across 38 time zones, sunrise/sunset display, Neobrite lume, and 200-metre water resistance. 55.4 × 51.3 × 19.4 mm, 93 grams. CR2025, approximately two-year battery life.

At a Glance

Why You'll Love It

• The green accents on the black carbon case give the -1A3 a military field-watch identity that the other two Mudmaster variants don't have. Green on black is the colour language of jungle terrain, military hardware, and night-vision equipment — it's the most contextually appropriate palette for a watch built for land-based missions. The green dial markings and hands provide functional contrast for quick readability without the high-vis visibility of the orange -1A9.
• The Quad Sensor system delivers four environmental readings from your wrist: compass bearing with analog hand indication of north for navigation, altimeter up to 10,000 metres with automatic data logging, barometer with a pressure tendency alarm that warns of incoming weather shifts, thermometer, and step counter. Each sensor provides actionable field data — direction, elevation, weather, temperature, and activity tracking.
• Mud resistance is the Mudmaster's core spec. Button gaskets and filters prevent dust, sand, and mud from entering the case. The carbon fiber-reinforced resin case and Carbon Core Guard structure absorb shocks without warping. The stainless steel panel back and glass-fiber resin back cover maintain the seal under impact. Built for construction, forestry, disaster relief, and environments where fine particles are unavoidable.
• Mission Log records altitude data from the watch's altimeter and route data from your phone's GPS via Bluetooth, building a combined activity log in the CASIO WATCHES app. Location Memory lets you mark coordinates. Both sync automatically, creating a growing history of outdoor routes and elevation profiles.
• The barometric pressure tendency alarm buzzes when atmospheric pressure changes significantly — advance warning of incoming weather before you can see it. The pressure graph displays the last 20 or 56 hours of atmospheric data for trend analysis.
• Bio-based resin for key case and band components — produced from renewable organic resources. At 93 grams with carbon fiber reinforcement, the Mudmaster is lighter than its visual bulk suggests. The carbon construction carries the strength of a heavier build at lower weight.

Perfect For

Key Features

• Quad Sensor — Digital compass (16 points, 0–359°, hand indication of north), altimeter (-700 to 10,000 m, auto log), barometer (260–1,100 hPa, pressure tendency alarm), thermometer (-10 to 60°C), and step counter (3-axis accelerometer, 0–999,999 steps).
• Mud Resistant + Carbon Core Guard — Button gaskets and filters block dust/mud. Carbon fiber-reinforced resin case. Stainless steel panel back. Glass-fiber resin back cover. Three-layer carbon fiber bezel.
• Green military-field accents — Green dial markings, hands, and case accents on black carbon body. Military terrain colour language for field readability without high-vis visibility.
• Bluetooth smartphone link + Mission Log — Auto time correction, altitude + route logging via CASIO WATCHES app, location memory, phone finder, ~300 world time cities.
• Sunrise/sunset display — Shows sunrise and sunset times for any specific date.
• 200-metre water resistance (20 BAR) — Suitable for swimming, snorkelling, and recreational water sports.

Technical Specifications

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Frequently Asked Questions

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