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Reviewing the Revamped Rolex Sea-Dweller

Rolex premiered its first divers’ watch, the Submariner, in 1953. The Sea-Dweller, which followed in 1967, had a nearly identical design. But since it was made for professional divers, it had an even more pressure-resistant case and a helium valve developed by Rolex. Rolex released a new model in 2017 to celebrate the Sea-Dweller’s 50th anniversary. It replaces the previous version, which debuted in 2014. Replica Watches UK

The changes are unusually numerous and extensive for Rolex. The red letters that spell out the name “Sea-Dweller” recall their counterparts on the original model. Rolex’s improved manufacture Caliber 3235 is used here for the first time in a sporty model. The most noticeable changes are the larger diameter of the case, which has grown from 40 mm to 43 mm, and the “Cyclops” magnifier in the crystal above the date. This lens had never been included on any previous Sea-Dweller.


Purists may criticize the fact that the Sea- Dweller now comes with a magnifying lens because this model never had one in the past. Along with the significantly enlarged case, this results in a change that clearly exceeds the cautious modifications that Rolex customarily undertakes in its models and that are the reason for the constant value of vintage Rolex watches. On the other hand, changes have never harmed the Sea-Dweller. Both the new model and its predecessor, which had not been a bestseller, are now eagerly coveted and are trading at prices far above the manufacturer’s retail price.

The new model’s design is successful, replica omega watches too. It now looks more like a larger version of the 40- mm-diameter Submariner, which is actually not a drawback. In fact, this newcomer is even more convincing with a full set of minutes strokes along the divers’ bezel and its name printed in red letters below the dial’s center. Rolex lavished greater attention on the proportions here than on the Deepsea and the Submariner. The lugs are narrower, which makes the case look more elegant and less angular. This is also true for the bracelet, which appears somewhat narrow on the Deepsea, but is comparatively broader and, therefore, has a more harmonious look on the new Sea-Dweller.


The height (15 mm) is a good match for the diameter. The Deepsea looks bulky by comparison and the Submariner seems almost too slim for a sports watch. All in all, the new Sea-Dweller is a contemporary and handsome interpretation of a Rolex divers’ watch.

Functionally, the new Sea-Dweller stays loyal to itself. The watertightness remains 1,220 meters. Needless to say, the case is equipped with a helium valve, although this feature is really necessary only for professional divers who decompress inside a pressurized chamber when engaging in saturation diving. In these conditions, a divers’ watch is surrounded by the gaseous breathing mixture, which contains helium. Under pressure, helium atoms can diffuse through a watch’s insulators and penetrate into its case, from which they cannot escape afterwards. This problem affected watches worn by divers in the U.S. Navy’s Sealab program, which was designed to research the effects that high pressure and various breathing gases have on humans. When the pressure was reduced in the decompression chamber, the crystals of these watches flew off. One of the Sealab divers told Rolex about this problem and suggested including a valve to release excess pressure by allowing helium that had penetrated into the case to escape without causing any damage. Rolex accordingly developed the helium valve, which many brands later included in their own watches.


Rolex has collaborated with Comex, the French diving specialists, since the early 1970s. Rolex supplied the watches for all Comex divers, who shared their professional experiences and helped further evolve Rolex’s watches. Comex lays undersea cables, performs underwater work on oil platforms, and can raise sunken ships. In the course of these adventurous tasks, Comex developed the necessary tools and experimented with various blends of breathing gases. Comex set numerous records for diving depth – and Rolex’s Sea-Dweller shared the ordeals because it was always strapped on the divers’ wrists.

Some of Rolex’s advertisements for the Sea-Dweller called attention to these record-setting achievements. For example, two divers spent 50 hours inside a pressurized chamber at a depth of 610 meters in 1972. Comex deep-sea divers subsequently plunged to beyond 500 meters’ depth. And a Comex diver descended to a depth of 701 meters inside a pressurized chamber in 1992. Comex really needed the Sea-Dweller’s helium valve and its greater pressure resistance (to a depth of 610 meters at the time) compared to the Submariner.


Rolex Dive Watches

Rolex’s three divers’ watches (from left): Submariner, Sea-Dweller and Deepsea. The new Sea-Dweller’s narrower lugs are clearly discernible in this comparative view.


Like the Submariner, which had been enlarged shortly before, the Sea-Dweller still measured 40 mm in diameter in 1976. The Submariner was equipped with a magnifying lens above the date in 1966, but the Sea-Dweller made do without this lens. Rolex replaced the Plexiglas with a sapphire crystal in 1978 and doubled the pressure resistance to 1,220 meters.

The Sea-Dweller Deepsea, with a diameter of 44 mm and pressure resistance to 3,900 meters, replaced its little sister in 2008. Not until 2014 would Rolex launch the new Sea-Dweller 4000 in a 40-mm case that remains watertight to 1,220 meters and bears a new ceramic dive-time scale on its bezel. This model didn’t sell very well, partly because it was significantly more expensive than the Submariner. After just three years on the market, it is bowing out and is supplanted by the larger Sea-Dweller.


Rolex not only optimized the proportions of the Sea-Dweller, it also improved other small details. For example, the luminous dot on the bezel is once again inset into the surface. This flush positioning makes the dot less likely to be knocked off if it comes into hard contact with a door frame or other object.

Legibility was already very good, so there wasn’t much room for improvement. Rolex’s “Chromalight” luminous material glows very brightly, so the displays are also clearly legible in twilight. The bluish color looks cool and doesn’t cause eyestrain. The triangle at 12 o’clock and the rectangular indexes at 6 and 9 assure instantaneous orientation. The zero index on the bezel also glows brightly. A luminous dot on the quickly moving seconds hand confirms in the dark that the watch is still running.


Rolex Dive Watches - buckles

Rolex has adjusted the width of the bracelet to the new size of the Sea- Dweller (near right). The bracelet of the smaller Submariner (far right) is much narrower.


Wearing comfort is good, too. Credit for this is primarily due to the case’s smooth back, the smooth underside of the folding clasp, and the supple steel bracelet. The individual links in this bracelet are curved so they can comfortably conform to the contours of the wrist. The spaces between the individual links remain unchanged in width even when the bracelet is bent sharply, thus assuring that they never pinch or tug at the hairs on the back of the wrist. The Glidelock clasp is solidly built and lets the wearer finely adjust the bracelet’s length. This ensures a quick and welcome dose of fresh air when the wrist expands on a hot day or after athletic exertion. Furthermore, the Fliplock extension lets the wearer add up to an additional 26 mm to the bracelet’s length. This means that the watch can be worn over the sleeve of a diving suit – a feature that the Sea-Dweller shares with the Deepsea, but which is lacking on the Submariner. The extension is visible on the Sea- Dweller because it protrudes from the clasp, being longer than an ordinary link in the bracelet. If the owner isn’t a diver and doesn’t like this feature, he can simply have the extension removed.

Opening the clasp accidentally is prevented by the safety bracket and its underlying rocker, which is easy to lift. But the clasp is still easy to operate, as is the readily grasped crown and the bezel, which clicks into each of its notches with smoothness and authority. The craftsmanship is impressive here, as it is throughout this well-made watch. The sides of the bracelet and the clasp are polished; the upper surfaces are satin finished. This combination of polishing and satin finishing likewise distinguishes the case.


Most potential purchasers opt for the Sea-Dweller because of its external characteristics, but Rolex nonetheless made some improvements inside the case. The Sea-Dweller is the first Rolex sports model to encase new Caliber 3235, which replaces Caliber 3135. Rolex initially deployed the new generation of calibers in precious-metal models (the Day-Date 40 and the Datejust Pearlmaster 39) in 2015, followed by the bicolor Datejust 41 in 2016. In 2017, Rolex encased this movement in the steel Datejust 41 and thus in models without any gold components in their cases.

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