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Casio DW-6900 Digital 53mm
Ref. DW-6900U-1ER
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Stepping up in the same colour and case shape
The DW-6900U-1ER belongs to G-Shock's long-running 6900 series, recognisable by its three-sub-dial face — a layout that has defined the line since the 1990s. The resin case measures 53.2 × 50.0 mm with an 18.7 mm thickness, worn on a matching resin band. Hardened mineral glass sits over the black LCD dial. Functions include a 1/100-second stopwatch with split and two-place timing, a 24-hour countdown timer with auto-repeat, a multi-function alarm with flash alert, and a white Super Illuminator LED backlight with afterglow. The auto-calendar runs to 2099. Water resistance is rated to 200 metres.
- Reference
- DW-6900U-1ER
- Brand
- Casio
- Collection
- G-Shock
- Case size
- 50mm
- Case material
- Resin
- Case shape
- Round
- Dial
- Black
- Crystal
- Mineral
- Movement
- Quartz
- Functions
- Stopwatch, Countdown timer, Alarm, Backlight, Perpetual calendar, Digital display
- Water resistance
- 200m
- Bracelet / strap
- Rubber strap
- Strap colour
- Black
- Clasp
- Buckle
- Retailer
- Goldsmiths
Additional specifications
- Weight
- 67g
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 7 collections
This watch appears in the Casio G-Shock range (84), Back in Stock (4,015), Watches 44mm and Over (743), Watches Under £100 (642), Sports Watches (565), Dive Watches (409) and All Black Watches (272).
Temporarily out of stock
Goldsmiths is not currently taking orders for this reference. Last listed as available on 1 November 2026. Stock is checked nightly and this page updates when it returns.
What the specifications mean
A watch built to be worn hard and got wet.
Strengths
- 200m water resistance, rated for actual diving
- Sits in the lower half of Casio's range as we list it
Worth knowing
- 50mm is a large watch with real presence
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 DW-6900 Digital alternatives
Watches from other brands at a similar price, style and size, so you can see what else your budget can buy.
| Specification | DW-6900U-1ER | PEWJQ21952411 | RW647AX9 |
|---|---|---|---|
| Price | £100 | £109 | £99 |
| Case size | 50mm | 51mm | 46mm |
| Water resistance | 200m | 50m | 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.
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 comparedIs it a men's or women's watch?
Listed as men's.
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