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Casio G-SHOCK G-SQUAD GBD-200-1ER Bluetooth Smart Training Watch - W17421
Ref. GBD-200-1ER
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Stepping up in the same dial colour
The GBD-200 sits within the G-Squad line as a fitness-first rethinking of the square G-Shock form — the silhouette clearly descended from the DW-5600, but stripped back and rebuilt for the wrist during a run rather than one resting on a desk. At 58g and 15mm deep, it is meaningfully lighter and flatter than a traditional G-Shock of this footprint, and the structural slits cut into the bezel sides make that thinness visible as well as felt. The display is a Memory-in-Pixel LCD, which stays sharp and readable at any angle without needing a backlight — though a dedicated front-mounted button puts the Super Illuminator LED within reach without breaking stride at night. Step counting relies on a flush fit against the wrist, and the strap reflects that: closely spaced adjustment holes give a precise, locked position that most generic rubber straps do not bother with, and the proprietary lug housing means standard aftermarket straps will not drop straight in.
- Reference
- GBD-200-1ER
- Brand
- Casio
- Collection
- G-Shock
- Case size
- 46mm
- Case material
- Resin
- Case shape
- Rectangular
- Dial
- Black
- Functions
- Chronograph, Day-date, Stopwatch, Countdown timer, Alarm, Backlight, World time, Bluetooth, Step counter, GPS
- Water resistance
- 200m
- Bracelet / strap
- Rubber strap
- Strap colour
- Black
- Retailer
- F.Hinds
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.
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
- Luminous hands and markers for low light
- Second time zone for travelling
Worth knowing
- 46mm is a large watch with real presence
Compare alternatives
Watches from other brands at a similar price, style and size, so you can see what else your budget can buy.
| Specification | GBD-200-1ER |  MTFP1F503 |  MK5473 |
|---|---|---|---|
| Price | £139 | £149 | £139 |
| Case size | 46mm | 46mm | 45mm |
| Water resistance | 200m | 100m | 100m |
| Movement | Quartz | Quartz | Quartz |
| Strap | Rubber 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.
Will the glass scratch?
It can, over time. Mineral glass handles daily wear but will pick up fine scratches that sapphire would not.
Does it need a battery?
Yes. It is quartz, so expect a battery change every two to three years at a jeweller.
Is 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.
Who are F.Hinds?
F.Hinds has been run by the same family since 1856 and is now in its fifth generation, with more than 115 shops across England and Wales. They are a member of the Responsible Jewellery Council and an Authorised Diamond Dealer.
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