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Casio’s unreleased G-Shock 2500 series already has a nickname. Leaked online and dubbed the “CasioNaut” by watch enthusiasts, it clearly takes a cue or two from the Patek Philippe Nautilus: broad shoulders, cushion-shaped case, all without those extra zeros on the end of the price tag.
Scheduled for release sometime in November 2026, the upcoming range includes the resin GAC-2500 and steel-bezel GMC-2500 models and will hit Japan with a resin version of the “CasioNaut” coming in at ¥20,900 (AUD$186). Gone is the analogue-digital layout we know from the GA-2100, with a small-seconds subdial and a three-cell date window that doubles as a mode indicator.
Casio has also given the analogue treatment a functional twist: the hands are held magnetically, allowing them to move under impact rather than being rigidly fixed in place.
Casio G-Shock 2500 Series Specs & Models
- GAC-2500: Resin case and strap; 46.7 × 44.5 × 12.7mm; 47g
- GMC-2500: Steel bezel and resin strap; 46.7 × 43.8 × 12.9mm; 68g
- GMC-2500D: Steel bezel and bracelet; 46.7 × 43.8 × 12.9mm; 138g
- Water Resistance: 200m
- Battery Life: Approximately two years
- Display: Fully analogue, with small seconds and a three-cell date/mode window
1/9G-Shock 2500 Features: Fully Analogue Dial & Magnetic Shock Protection
Before they took the page down and a 404 error took its place, Casio said the 2500 series design traces back to the original DW-5000C. The two-eyed dial gives the watch its cleaner facade, with a more traditional look than the analogue-digital G-Shocks we’ve become so accustomed to. Its smaller seconds subdial sits at 9 o’clock, opposite the date window at 3 o’clock, with a Shock Resist mark tucked onto the tail of the seconds hand.
The magnetic holding mechanism is where the G-Shock engineering comes through, and we find the trick up Casio’s sleeve.
They say the hands can absorb and deflect shocks, and while the minute hand may wobble or temporarily shift position after an impact, give it a few minutes and it should return to its correct position. At least that’s the idea, since the watches are still unreleased and the original official product page has disappeared. But we do know there’s also a seconds-sleep function to help conserve battery power, so that’s cool.
That plastic dial certainly adds some depth to the markers and subdials on the front, especially with the array of colours supposedly on offer. But if you do find us in the store, we’ll be asking to try on the steel-bezel version.
Casio G-Shock 2500 Price and Availability
The resin GAC-2500 is listed in black, green, white and yellow for ¥20,900 (AUD$186) in Japan. The steel-bezel GMC-2500 range includes a resin-strap version at ¥37,400 (AUD$333) and a steel-bracelet GMC-2500D at ¥49,500 (AUD$441). All are scheduled for November 2026.
Australian pricing and availability have not yet been confirmed. But if you already enjoy the CasiOak, the CasioNaut looks like a natural next step. Same G-Shock toughness, a different way of telling the time, and another nickname for the collection.
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