The current Rolex Explorer comes in two Oystersteel sizes: 36 mm (reference 124270) and 40 mm (reference 224270). Both use Rolex calibre 3230, have a stated power reserve of approximately 70 hours, and are rated water-resistant to 100 metres (330 feet). These are Rolex specifications, not independent test results.
Which Rolex Explorer models are current?
Rolex currently lists the Explorer in 36 mm and 40 mm. The two versions share the core design and movement, but differ in case diameter and reference number.
| Specification | Explorer 36 | Explorer 40 |
|---|---|---|
| Reference | 124270 (Rolex: Explorer 36) | 224270 (Rolex: Explorer 40) |
| Case diameter | 36 mm | 40 mm |
| Case and bracelet | Oystersteel case; three-link Oyster bracelet | Oystersteel case; three-link Oyster bracelet |
| Dial | Black, with 3, 6 and 9 numerals and Chromalight luminescence | Black, with 3, 6 and 9 numerals and Chromalight luminescence |
| Movement | Rolex calibre 3230, self-winding mechanical | Rolex calibre 3230, self-winding mechanical |
| Stated power reserve | Approximately 70 hours (Rolex) | Approximately 70 hours (Rolex) |
| Stated water resistance | 100 metres (330 feet) (Rolex) | 100 metres (330 feet) (Rolex) |
| Finished-watch precision | -2/+2 seconds per day under Rolex’s Superlative Chronometer criteria | -2/+2 seconds per day under Rolex’s Superlative Chronometer criteria |
| Clasp and extension | Oysterlock safety clasp; Easylink extension of approximately 5 mm (Rolex) | Oysterlock safety clasp; Easylink extension of approximately 5 mm (Rolex) |
Rolex’s Explorer overview and individual model pages provide the specifications. Figures for power reserve, water resistance and precision are manufacturer claims; they are not independent measurements.
Rolex Explorer 36 vs. 40: which size should you choose?
The clearest distinction is the 4 mm difference in stated case diameter. That number alone does not establish which watch will fit or look better on a particular wrist. Wrist shape, personal taste and the proportions you prefer all matter, and the available specifications do not provide comparative wear testing.
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- Imported
- Pre-Loved Condition: Very Good; Minor scratches on case and band.
- Case Size/Width: 39mm, Watch Height: 11mm, Band Width: 20mm, Wrist circumference: 7.5"
- Band material: Stainless Steel
- Case material: Stainless Steel
- Consider the 36 mm reference 124270 if you prefer the smaller stated diameter or want the size Rolex says the Explorer returned to in 2021.
- Consider the 40 mm reference 224270 if you prefer the larger stated diameter; Rolex says this size has been available since 2023.
Whenever possible, try each size on and assess how the case and bracelet sit on your own wrist. Do not treat diameter as a substitute for fit.
What do the Explorer’s specifications mean?
Calibre 3230 and power reserve
Rolex describes calibre 3230 as a self-winding mechanical movement with a Chronergy escapement, blue Parachrom hairspring and Paraflex shock absorbers. Rolex gives its power reserve as approximately 70 hours. Power reserve is the approximate running time after the watch is fully wound, assuming it is not rewound during that period.
Rank #2
- Gold tone stainless steel case 45mm diameter x 13mm thick; Black and blue dial; Luminous hands and hour markers
- Japanese quartz movement, VD57 Caliber; Assembled in Japan; SR920SW battery included; Watch weight: 170 grams
- Gold tone stainless steel band, 185mm L x 22mm W; Band is adjustable by adding/removing links; Fold over safety clasp
- Mineral crystal; Push/pull crown; Unidirectional blue and gold tone stainless steel bezel; Functional Subdials: 60min, 60sec, 1/10th sec; 50 meter water resistant: Suitable for washing hands, light splashes, swimming in shallow depths.
Water resistance
Rolex rates the Oyster case to 100 metres (330 feet). This is a manufacturer-rated water-resistance specification, not a promise about every real-world circumstance or an independent test result. Follow Rolex’s guidance for care and use, and have the watch checked if its water resistance is in doubt.
Precision
Rolex states finished-watch precision of -2/+2 seconds per day under its Superlative Chronometer standard. This is the brand’s stated criterion for a cased watch, not a guarantee that every individual watch will show identical results in every condition.
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- Mens Wrist Watch: Features a classic big dial and quartz movement with stable quality. High hardness coated glass mirror is wear-resistant, scratch-proof, Butterfly double buckle ensures comfortable wear
- OLEVS Mens Watches: Unique Classic Design Analog Date Calendar Display Watch Window. Easy to Read, Classic Business Style, Stylish Casual Dress Watch, Stylish Gold Indexes and Round Case, finely designed, stand the test of time, handsome and outstanding
- Business Pointer Quartz Watch: Dial diameter is 1.6 inches (41 mm). Case thickness is 0.43 inches (11 mm), steel band width is 0.79 inches (20 mm), length is 8.66 inches (22 cm). The weight of the men's watch is 4.16 ounces (118 g)
- Fashion Gold Green Man Watch: Luminous Hands/Markers and Enlarged Date Window at Three o'clock, Stylish Watch with Roman Scale Bezel, Water Resistance Up to 30M. Usually, Suitable for Swimming, But not Suitable for Deep Diving
- Night-light Function：When Using the Luminous Pointer Function for the First Time, Please illuminate The Watch Under The Light for 30 Seconds to Activate the Luminous Function. Watch Chain Can Be Adjusted in Size
Bracelet, clasp and dial
Rolex specifies a three-link Oyster bracelet with an Oysterlock safety clasp and an Easylink extension that adds approximately 5 mm. The black dial has the Explorer’s 3, 6 and 9 numerals and Chromalight luminescence, according to Rolex.
Independent reader supportYour contribution helps us test, update, and keep practical guides available for everyone.Why is the Rolex Explorer associated with Everest?
Rolex dates the Explorer’s launch to 1953, in the wake of the Everest ascent. The distinction matters: Rolex’s account connects Oyster Perpetual watches with the expedition; it does not establish that a production Explorer was worn on the summit. The brand traces its broader relationship with expeditions to the 1930s.
Rank #4
- Green dial, Gold tone stainless steel band
- 43mm stainless steel case;Screw down crown;Flame Fusion crystal
- 100 meter water resistant
The model’s recent size history helps explain today’s two options. Rolex says the Explorer returned to 36 mm in 2021 after moving to 39 mm in 2010; the 40 mm version followed in 2023.
Where should you buy or service a Rolex Explorer?
Rolex states that “Only official Rolex retailers are allowed to sell and maintain a Rolex watch.” Use Rolex’s official retailer channel to identify an authorized retailer or service route. That does not establish local stock, a delivery timeline or a particular price.
If considering a secondary-market watch, verify the seller’s identity, the exact reference, authenticity, warranty status and condition independently. A marketplace listing should not be assumed to be Rolex-authorized, and no current local or secondary-market price is established here.
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Product prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on Amazon at the time of purchase will apply.
