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Rolex Explorer 40
Ref. 224270
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Stepping up in Rolex's range
The Explorer's story runs through some of the most hostile environments a watch has ever been asked to survive, and the 224270 reflects exactly that unbroken intention: clean black dial, three Arabic numerals, Mercedes hands, nothing added. What changed when this reference replaced the 39mm model was scale alone — a considered step up for those who found the proportions of that generation slightly reserved, and a complement to the 36mm that remains in the line. At 11.6mm the case is notably slim for what the movement inside it demands. The 3230 calibre is built around Rolex's Chronergy escapement and a Parachrom hairspring resistant to magnetic fields and shock, holding accuracy to within two seconds a day — serious engineering kept invisible beneath an 11.6mm profile and curved lugs that let it disappear under a cuff. The Chromalight in the white gold hands and numerals shifts from white to a long-lasting blue in darkness, so the dial that reads as spare and flat in daylight becomes properly legible on an unlit staircase. The Easylink system in the clasp deserves a mention precisely because its absence frustrates owners of watches that lack it: 5mm of bracelet extension adjustable without a tool, mid-wear, so the fit that suited you indoors works just as well after a flight.
- Reference
- 224270
- Brand
- Rolex
- Collection
- Explorer
- Case size
- 40mm
- Case thickness
- 11.6mm
- Lug width
- 21mm
- Case material
- Stainless steel
- Case shape
- Round
- Dial
- Black
- Crystal
- Sapphire
- Bezel
- Fixed
- Movement
- Automatic
- Calibre
- 3230
- Water resistance
- 100m
- Bracelet / strap
- Stainless steel bracelet
- Strap colour
- Silver
- Clasp
- Folding clasp
- Lume
- Luminous
- Retailer
- Goldsmiths
Additional specifications
- Lug-to-lug
- 48mm
- Power reserve
- 70 hours
Learn more about Rolex
Hans Wilsdorf founded Wilsdorf & Davis in London in 1905 with his brother-in-law Alfred Davis, importing Swiss movements and casing them in England. He registered the name Rolex in 1908 — short, pronounceable in any language, and easy to fit on a dial.
Wilsdorf's conviction was that the wristwatch, then regarded as a woman's ornament and hopelessly fragile, could be made accurate and durable. He proved the first half in 1910 by obtaining the first chronometer certification for a wristwatch, and the second in 1926 with the Oyster case, sealed by a screw-down crown and caseback. Mercedes Gleitze swam the Channel wearing one in 1927, and Wilsdorf bought the front page of the Daily Mail to say so — arguably the first modern watch marketing campaign.
The Perpetual rotor followed in 1931, giving automatic winding in a form the whole industry eventually copied. The company relocated to Geneva during the First World War to escape British wartime duties.
The professional models arrived in a compressed burst in the 1950s: Submariner, Explorer, GMT-Master, Milgauss, and later the Daytona. Each was built for a specific job — diving, exploration, aviation, laboratory work, racing — and each became a design template.
Wilsdorf left his shares to a private foundation on his death, so Rolex answers to no shareholders. It remains the largest producer of certified chronometers in Switzerland by a wide margin.
- 1905
- Hans Wilsdorf founds Wilsdorf & Davis in London.
- 1908
- The Rolex name is registered.
- 1926
- The Oyster case introduces genuine water resistance.
- 1931
- The Perpetual rotor brings modern automatic winding.
- 1953
- The Submariner and Explorer launch.
- 1963
- The Cosmograph Daytona arrives.
Also in 3 collections
This watch appears in Stainless Steel Watches (2,624), Back in Stock (1,916) and Automatic Watches (1,472).
Manufacturer’s guarantee
What the specifications mean
A mechanical watch for everyday wear.
Strengths
- 100m water resistance covers swimming and watersports
- 40mm suits most wrists
- Sapphire crystal, which resists scratching
- 70-hour reserve survives a weekend off the wrist
- Luminous hands and markers for low light
Rolex Explorer 40 alternatives
Watches from other brands at a similar price, style and size, so you can see what else your budget can buy.
| Specification | 224270 | 49.4000.3620/21.I001 | 1-90-02-43-32-62 |
|---|---|---|---|
| Price | £9,450 | £9,100 | £10,100 |
| Case size | 40mm | 40mm | 40mm |
| Water resistance | 100m | 100m | 50m |
| Movement | Automatic | Automatic | Automatic |
| Strap | Stainless steel bracelet | Rubber strap | Leather strap |
| Power reserve | 70 hours | 60 hours | — |
| 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 100m it is rated for swimming and snorkelling, though not for diving.
Will the glass scratch?
Unlikely. Sapphire is second only to diamond in hardness and shrugs off everyday marking.
Does it need a battery?
No. It is automatic — the motion of your wrist winds it, and there is no cell to replace.
How long does it run for when it's not worn?
About 70 hours fully wound — enough to sit off the wrist over a weekend and still be running.
What size strap does it take?
21mm. 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 48mm, 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, though at 40mm it sits in the range that suits anyone.
Cheapest place to buy
Goldsmiths is the only UK retailer we track stocking this reference new, at £9,450. 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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