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Casio Full Metal 5000 Series 43.6mm Mens Watch Black
Ref. GMW-BZ5000BD-1ER
Sits in Casio’s upper tier here — more premium than three quarters of the Casio watches we list, which start at £25.
Price range £25 to £919 across 129 Casio watches in stock.The GMW-BZ5000 sits at the top of the full-metal square lineage that Casio began building around the GMW-B5000, and the distinction between the two is meaningful. Where the earlier model used a conventional LCD, this one carries a memory-in-pixel display — a high-definition screen that reads with far more contrast and clarity in direct light. The case and bezel interlock in an assembly that was refined using AI impact simulation, with internal resin dampeners absorbing shock without softening the external silhouette, which remains hard-edged and square throughout. At 172 grams it announces itself on the wrist, and there is no pretending otherwise. What the three-pronged lug geometry does is allow the integrated bracelet to curve with the wrist rather than sit flat across it, so the weight is distributed rather than cantilevered. The ion-plated finish runs from the case through to every link, giving the whole piece a consistency that a two-tone construction could not match, and the PVD treatment is meaningfully more abrasion-resistant than standard plating. Low-light legibility comes entirely from the Super Illuminator backlight, which triggers on wrist-tilt — there are no painted markers to fade. The calibre 3575 draws from radio signals across six atomic networks and syncs via Bluetooth, which means the time is never set manually and, on a full charge, will run for up to 22 months before it needs to see light again.
- Reference
- GMW-BZ5000BD-1ER
- Brand
- Casio
- Collection
- G-ShockCase Size: 43
- Case size
- 43.6mm
- Case thickness
- 13mm
- Lug width
- 25.5mm
- Case material
- Black PVD
- Case shape
- Square
- Dial
- Black
- Crystal
- Mineral
- Movement
- Solar
- Functions
- Stopwatch, Countdown timer, Alarm, Backlight, World time, Perpetual calendar, Solar powered, Radio controlled, Bluetooth, Digital display, Radio-controlled
- Water resistance
- 200m
- Bracelet / strap
- Stainless steel bracelet
- Strap colour
- Black
- Clasp
- Three-fold clasp
- Lume
- Luminous
- Retailer
- Goldsmiths
Additional specifications
- Lug-to-lug
- 49.3mm
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
- 49.3mm lug-to-lug keeps the 43.6mm case wearable
- Luminous hands and markers for low light
- Second time zone for travelling
- One of Casio's more premium watches
Worth knowing
- 43.6mm sits at the larger end
Compare alternatives
Watches from other brands at a similar price, style and size, so you can see what else your budget can buy.
| Specification | GMW-BZ5000BD-1ER |  CB5887-55H |  SNE597P1 |
|---|---|---|---|
| Price | £619 | £579 | £470 |
| Case size | 43.6mm | 43mm | 41mm |
| Water resistance | 200m | 200m | 200m |
| Movement | Solar | Solar | Solar |
| Strap | Stainless steel bracelet | Stainless steel bracelet | Stainless steel bracelet |
| This watch | Closely matched |
|
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?
No. It charges from light, and the cell behind that is designed to last a decade or more.
What size strap does it take?
25.5mm. Any strap of that width will fit, and on most modern watches quick-release bars make the swap a two-minute job with no tools.
Will it fit my wrist?
Lug-to-lug is 49.3mm, which suits wrists from roughly 16.5cm (6½ inches) upward.
Lug-to-lug decides fit more than case diameter does.
Is it a men's or women's watch?
Listed as men's.
Cheapest place to buy
Goldsmiths is the only UK retailer we track stocking this reference, so there is nothing to compare it against today.
Who are Goldsmiths?
Goldsmiths has been selling watches in Britain since 1778 and is part of the Watches of Switzerland Group, which is listed on the London Stock Exchange. They are an authorised dealer, so a watch comes with the manufacturer’s own warranty.
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