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Casio G-SHOCK GAC-2500-7AER White Resin Strap Watch - W17621
Ref. GAC-2500-7AER
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Stepping up in Casio's range
The GAC-2500 arrives in late 2026 as a purely analogue reading of the octagonal case shape that G-Shock began with in 1983, stripped of the digital displays that have defined the line ever since. The all-white build uses bio-based resin throughout — case, dial, strap — and the monochrome is consistent enough that the fan-shaped date window at 3 o'clock nearly disappears into the dial, as intended. At 9 o'clock, the small seconds sub-dial carries a Shock Resist emblem on the tail of its hand, a quiet acknowledgement of where this geometry came from. The movement behind it is built at Casio's Yamagata factory in Japan, and it does something unusual: the minute hand is held magnetically rather than fixed to the shaft, so a sharp impact releases it rather than bending it, and it returns to position within minutes. That engineering sits inside a case that at 47 g and a 46.7 mm lug-to-lug span wears considerably closer to a dress watch than anything else in the G-Shock range — the 12.7 mm profile clears a cuff without negotiation. The second-hand sleep function, which parks the small seconds hand to extend battery life, is the kind of detail that becomes a habit rather than a novelty.
- Reference
- GAC-2500-7AER
- Brand
- Casio
- Collection
- G-Shock
- Case size
- 44.5mm
- Case thickness
- 12.7mm
- Case material
- Resin
- Case shape
- Octagonal
- Dial
- White
- Crystal
- Mineral
- Movement
- Quartz
- Calibre
- 5757
- Functions
- Date, Small seconds
- Water resistance
- 200m
- Strap colour
- White
- Clasp
- Buckle
- Lume
- Luminous
- Retailer
- F.Hinds
Additional specifications
- Lug-to-lug
- 46.7mm
- Weight
- 47g
Learn more about Casio
Tadao Kashio founded Kashio Seisakujo in Tokyo in 1946 as a machine shop. The company's first success was a finger ring that held a cigarette, and its second was the 14-A of 1957 — the world's first all-electric compact calculator, which used solenoids rather than gears.
Casio entered watchmaking in 1974 with the Casiotron, a digital watch with an automatic calendar that knew the varying lengths of months. The company approached watches as an electronics manufacturer rather than a horological one, and that difference produced the G-Shock.
The G-Shock came from a single engineer, Kikuo Ibe, who broke a watch his father had given him and set out to build one that could not break. The specification was three tens: survive a ten-metre drop, ten bars of water pressure, and ten years of battery life. It took over two hundred prototypes, and the solution was suspending the module inside the case on a cushioned internal structure rather than mounting it rigidly. The DW-5000C shipped in 1983.
It became one of the most durable product designs in any category, adopted by militaries, emergency services, and skateboarders alike, and Casio has since added solar charging, radio and GPS timekeeping, Bluetooth, and full-metal and carbon variants.
Casio also produces the Edifice, Pro Trek, and Oceanus lines, and remains an independent Japanese public company.
- 1946
- Tadao Kashio founds the company in Tokyo.
- 1974
- The Casiotron is Casio's first digital watch.
- 1983
- The G-Shock DW-5000C survives Kikuo Ibe's three-tens brief.
- 1994
- The Frogman extends G-Shock to ISO dive certification.
Also in 5 collections
This watch appears in the Casio G-Shock range (91), Sports Watches (800), Watches 44mm and Over (798), Dive Watches (572) and Dive Watches Under £300 (94).
Manufacturer’s guarantee
What the specifications mean
A watch built to be worn hard and got wet.
Strengths
- 200m water resistance, rated for actual diving
- 46.7mm lug-to-lug keeps the 44.5mm case wearable
- Luminous hands and markers for low light
Worth knowing
- 44.5mm sits at the larger end
Also seen with this model (12)
Other versions of this model, not necessarily this exact watch.
- Keanu Reeves · Casio G-Shock ref. DW-5600C-1V · Worn on screen · Speed · Source
- Chris Pratt · Casio G-Shock ref. GA-100-1A1 · Worn on screen · The Terminal List · Source
- Eminem · Casio G-Shock ref. GM-110G-1A9 · Spotted · Source
- Sean Penn · Casio G-Shock ref. DW-6900 · Worn on screen · One Battle After Another · Source
- Alan Ritchson · Casio G-Shock ref. GW-9500 · Worn on screen · War Machine · Source
- Central Cee · Casio G-Shock ref. DW-6900SP-1 · Spotted · Source
- John Mayer · Casio G-Shock · Owns · Hodinkee collaboration · Source
- Josh Hutcherson · Casio G-Shock ref. DW-5600 · Worn on screen · Five Nights at Freddy's · Source
- Russell Crowe · Casio G-Shock · Worn on screen · Land of Bad, MR-G · Source
- Spike Lee · Casio G-Shock ref. DW-6900SC-4D · Owns · Bright orange · Source
- 50 Cent · Casio G-Shock ref. G-7900 · Spotted · Source
- Anthony Ramos · Casio G-Shock ref. DW-5900 · Worn on screen · Transformers: Rise of the Beasts · Source
Casio G-SHOCK GAC-2500-7AER White Resin alternatives
Watches from other brands at a similar price, style and size, so you can see what else your budget can buy.
| Specification | GAC-2500-7AER | W0247G3 | RM327JX9 |
|---|---|---|---|
| Price | £110 | £119 | £120 |
| Case size | 44.5mm | 45mm | 45mm |
| Water resistance | 200m | 100m | 100m |
| Movement | Quartz | Quartz | Quartz |
| Strap | — | Silicone strap | Stainless steel bracelet |
| This watch |
|
|
Your new watch
Frequently asked questions, and things you should know about this watch
Can I swim with it?
Yes. At 200m it is rated for swimming, snorkelling and recreational diving.
Water resistance explainedWill the glass scratch?
It can, over time. Mineral glass handles daily wear but will pick up fine scratches that sapphire would not.
Sapphire, mineral and acrylic comparedDoes it need a battery?
Yes. It is quartz, so expect a battery change every two to three years at a jeweller.
Quartz, automatic and solar comparedWill it fit my wrist?
Lug-to-lug is 46.7mm, which suits wrists from roughly 16cm (6¼ inches) upward.
Lug-to-lug decides fit more than case diameter does.
How to size a watch to your wristIs it a men's or women's watch?
Listed as men's.
Cheapest place to buy
F.Hinds is the only UK retailer we track stocking this reference, so there is nothing to compare it against today.
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