Casio G-Shock "Black Tone" full metal watches: Exact release date and time revealed in new leak

As per fresh info from Japanese blog Great G-Shock World, Casio will open preorders on October 1 for its new G-Shock Black Tone full metal series, which includes the GM-B2100BT-1A, GMC-B2100BT-1A, and GMW-B5000BT-1 watches. All three models sport a stainless steel construction and a combination of black bezel or dial elements with brushed silver finishing. The designs are directly derived from popular existing models and use a black color scheme specifically in the bezels, as confirmed in recent Japanese retail announcements and product images via leaks.

Models and key specs

For the sake of recap, the GMW-B5000BT-1 is a digital model based on the GMW-B5000 series, with the same structure and the black ion-plated bezel as a centerpiece of its design. It will retail for 88,000 yen in Japan (about $600 USD), matching the pricing of prior GMW-B5000 models sold in other regions (like the Casio GMW-B5000-D1 - curr. $532 on Amazon). The GM-B2100BT-1A hybrid model is also set at 88,000 yen in Japan, while the analog-only GMC-B2100BT-1A will retail for 107,800 yen (about $800 USD), making it the most expensive in this trio. Previous reports also discuss pricing parity with European markets, where the GMW-B5000BT-1 is expected at €579 and the GM-B2100BT-1A at approximately £449/€549. The GMC model will reportedly follow the price point of the GMC-B2100AD-2A.

Ordering and availability

Preorder access reportedly begins at midnight (Japan Standard Time) on October 1 across major Japanese e-commerce platforms, including Yahoo! Shopping, Rakuten, and Amazon Japan. While a vague October release was speculated earlier, this is our first look at the precise launch date and time. Retailers are also saying that these watch editions will likely sell out quickly, because of limited initial supply and high advance interest. Early listings and product specs confirm that all models will be available for direct consumer purchase starting in October 2025 in Japan. However, no confirmed launch details have yet been provided for markets beyond Japan.