CASIO G-SHOCK GG-B100XMB-1ADR MUDMASTER MASTER OF G ANALOG-DIGITAL BLACK IP STEEL BEZEL WATCH

The GG-B100XMB-1ADR is the black IP metal-bezel Mudmaster — the most refined variant in the GG-B100X lineup. The forged stainless steel bezel is ion-plated in black with a mirror finish, combining outstanding scratch resistance with a polished metallic sheen that the silver honed-matte XM and the resin X variants can't match. Where the XM's honed finish is deliberately functional and understated, the XMB's mirror-polished black IP is designed to look as good as it performs — a refined luster on a tool watch built for the harshest terrain.

Module 5744 and every specification are identical to all other GG-B100X Mudmasters: 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, 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, 104 grams. CR2025, approximately two-year battery life.

At a Glance

Why You'll Love It

• The black ion-plated mirror-finish bezel is the top of the Mudmaster bezel hierarchy. The forged stainless steel is shaped through the same forging process as the silver XM — multiple surfaces, bevelled edges, and contoured sides each finished with different polishing techniques — but the black IP mirror finish adds two qualities the XM doesn't have: a refined metallic sheen that catches and reflects light with a polished-glass quality, and a blacked-out tone that unifies the bezel with the black carbon fiber-reinforced case body. The XMB is the Mudmaster that looks as tactical as it is tough.
• Black IP on stainless steel delivers scratch resistance through two mechanisms: the ion plating itself is bonded at the molecular level (more durable than traditional plating), and the mirror-polished surface underneath is smooth enough to resist scoring from debris. In the field, this translates to a bezel that maintains its appearance longer than matte finishes under the same conditions.
• The all-black aesthetic — black IP bezel, black carbon case, black resin band — creates a unified stealth presence that the silver XM and the colour-accented X variants don't achieve. Every element is dark. The only contrast comes from the dial markings, hands, and the double LED Super Illuminator when activated. If the resin-bezel X variants are the working Mudmasters and the silver XM is the refined one, the XMB is the tactical one.
• The Quad Sensor system is identical to every other Mudmaster: compass, altimeter (10,000 m with auto logging), barometer (pressure tendency alarm), thermometer, and step counter. Mud resistance, Carbon Core Guard, Bluetooth Mission Log, sunrise/sunset, 200m water resistance — the bezel finish changes the look, not the capability.
• At 104 grams, the XMB weighs the same as the silver XM — the black IP coating doesn't add measurable weight. Both metal-bezel variants are 11 grams heavier than the 93-gram resin-bezel X models, and the added weight from the forged steel communicates quality and solidity on the wrist.
• Bio-based resin for key case and band components. The combination of black IP stainless steel, carbon fiber-reinforced resin, and bio-based materials makes the XMB one of the most material-diverse G-Shocks in the lineup.

Perfect For

Key Features

• Forged stainless steel bezel — black ion plating, mirror finish — Scratch-resistant, polished metallic sheen. The most refined bezel in the Mudmaster lineup. All-black stealth aesthetic.
• 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.
• 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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