The previous generation of both the Rolex Sea-Dweller and the Rolex Deepsea was powered by the tried-and-true Caliber 3135 movement, which has been used to power there majority of Rolex’s date-displaying watches since the late 1980s. However in 2017, Rolex began updating their various Sea-replica rolex watches Dweller watches with their all-new generation of in-house date displaying movement, the Caliber 3235.
Despite their differences, today all Rolex Sea-Dweller and Deepsea watches are fitted with Caliber 3235 movements. Protected by fourteen patents, and boasting a 70-hour power reserve, the Caliber 3235 also incorporates Rolex’s new, highly efficient Chronergy escapement, in which both the redesigned pallet fork and escape wheel are made from nickel-phosphorous to be insensitive to magnetic interference.
Despite having case diameters that are just 1mm apart, the Rolex Sea-Dweller and the Rolex Deepsea have significantly different appearances due to the inner bezels that appear on the two different watches. The standard Rolex Sea-Dweller follows the classic inner bezel design, while the one on the Deepsea is much larger and has the words “Original Gas Escape Valve” and “Ring Lock System” visibly displayed under the crystal.
The prominent inner bezel on the Deepsea is actually a structural component of the watch’s specialized case design. The extra thick, domed sapphire crystal sits against the inner bezel ring, which is constructed replica watches uk from an extra hard, nitrogen-alloyed steel. As the massive pressures found deep below the ocean’s surface press down on the crystal of the Deepsea, the component si supported by the inner ring, allowing the watch to withstand water pressure equivalent to a weight of more than 3 tons on the crystal.
Additionally, the caseback on the Rolex Deepsea is a design specifically engineered to allow the watch to withstand incredibly high pressures that would otherwise deform traditional casebacks. While the caseback on the standard Rolex Sea-Dweller is the usual, solid, stainless steel variety, the caseback on the Deepsea is a multi-part system, in which a slightly flexible titanium cover sits against the opposite side of the inner bezel support ring, while a stainless steel, donut-shaped piece screws on top of the titanium cover to hold it all together. As depth increases, the water pressure forces the crystal and the titanium rear cover into the gaskets of the watch, pressing them against its extra hard, nitrogen-alloyed steel support ring. This design allows the seal of the Deepsea to improve as pressure increases, enabling even greater possible depths.
Both the Rolex Sea-Dweller and Rolex Deepsea are among the most robust and water resistant watches that Rolex has ever produced. For many, the Submariner provides far more moisture protection than they are ever likely to be required; however for those that truly require the utmost water resistance, there are no better options than those found in the Rolex Sea-Dweller collection.