Casio has expanded its tough, adventure-ready lineup in the UK with three newly available G-Shock Master of G Mudmaster GG-B100 models. These watches sit within the broader GG-B100X series, which was officially revealed in early February 2025 and includes five total variants.
Shoppers in the UK can now purchase the Casio G-Shock GG-B100X-1A, GG-B100X-1A3, and GG-B100X-1A9 directly from Casio’s online store, each priced at £349. Availability is also starting to appear across parts of Europe. In Casio’s EU online stores, including Germany, the GG-B100X-1A and GG-B100X-1A3 have been listed alongside the GG-B100XM-1A, with prices ranging from €399 to €419 and a “coming soon” status.
What makes the GG-B100 range stand out is its Quad Sensor toolkit designed for outdoor use. You get a digital compass for navigation, an altimeter/barometer for tracking elevation and weather shifts, a thermometer for temperature checks, and a step counter for activity tracking. The watch also supports Bluetooth connectivity, enabling automatic time adjustments and additional features through the Casio Watches smartphone app.
Beyond its sensor package, the Mudmaster GG-B100X is built to handle harsh conditions. It’s shock-resistant and mud-resistant, offers 200-meter water resistance, and uses Casio’s Carbon Core Guard structure for added durability. It also includes practical everyday and travel tools like sunrise and sunset times, a stopwatch, a timer, and daily alarms.
Design-wise, each version keeps the rugged Mudmaster identity while offering distinct color options. All models feature a carbon case, a metal bezel, and a resin strap. The GG-B100X-1A comes in an all-black look, the GG-B100X-1A3 mixes black with khaki accents, and the GG-B100X-1A9 stands out with a black face paired with a bold bright orange band.
Two additional models in the same family, the GG-B100XM-1A and GG-B100XMB-1A, are still shown on Casio’s UK “coming soon” page, suggesting more releases may be close behind. As for the United States, Casio hasn’t confirmed a release timeline yet, so US availability for the GG-B100X series remains uncertain.
