Casio’s latest addition to its rugged watch lineup, the G-Shock Mudmaster GG-B100X series, is gradually reaching a wider audience in Europe after its initial rollout earlier this year. The collection first appeared in the United Kingdom in mid-February before making its way to the United States, and is now finding shelf space in several European markets.

Retail listings show that three of the five announced models are currently available through the company’s online stores in countries including the Netherlands, France and Germany. The staggered release has left two variants absent from these markets, with no clear explanation from the manufacturer so far.

Among the models now on sale, the GG-B100X-1A and GG-B100X-1A3 stand out with their carbon bezels and carbon fiber-reinforced resin cases. Both are priced at €399. A third option, the GG-B100XM-1A, takes a slightly different approach with a stainless steel bezel, pushing its retail price to €419.

The Mudmaster line has long been positioned as part of Casio’s more durable offerings, and the GG-B100X series continues that direction. The watches are built to handle demanding conditions, combining shock resistance, mud resistance and water resistance rated up to 200 meters. The design reflects that intent, with a robust exterior and a hybrid display that merges analog hands with a digital inset.

Functionality remains a central focus. The watches are equipped with Casio’s Quad Sensor system, integrating a digital compass, altimeter and barometer, thermometer and step counter. Bluetooth connectivity allows users to sync with the Casio Watches app, where activity logs and other data can be reviewed.

Beyond its outdoor-focused features, the watch includes everyday tools such as world time, sunrise and sunset information, multiple alarms, a stopwatch accurate to one-hundredth of a second, and a countdown timer. Visibility in low-light conditions is supported by a double LED backlight.

Early demand appears to be uneven across the range. The GG-B100X-1A model is already close to selling out in parts of the European Union, suggesting stronger interest in certain variants. Why Casio has chosen to release only three models in these markets, while holding back the full five-piece lineup, remains unclear at this stage.

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For now, the broader European rollout signals a steady expansion rather than a full-scale launch, leaving some gaps in availability even as interest in the series continues to build.