Sea-Dweller Deep Sea Ref.116660

Following the 3rd generation Sea-Dweller Ref.16600, Ref.116660 was completely renewed as the Sea-Dweller Deep Sea. In addition to the new case structure called the Ringlock System, which was originally developed and patented by Rolex, the use of 904L stainless steel (Oystersteel) has achieved the highest waterproof performance of 3900m. The case size is 44mm, which is one of the largest Rolex watches. It was manufactured from 2008 to 2018.
In 2012, film director and adventurer James Cameron boarded the submersible Deepsea Challenger and challenged a solo dive into the Mariana Trench in the Pacific Ocean, the deepest part of the world's oceans. Achieved a dive to m. At this time, a model called Deepsea Challenge witnessed this historic dive. In 2014, the D-Blue-BLUE dial with a beautiful blue gradation was released in honor of this achievement. In addition to the original black bezel, the black dial is now available in two colors with the advent of the D-Blue dial. As a minor change, the D-Blue dial has increased the proportion of blue since around 2017, and is reflected in the current model that appeared in 2022.

The changes from the 3rd generation Sea-Dweller Ref.16600 include a new case structure called the Ringlock System, a 5.5mm thick dome-shaped Sapphire crystal, a nitrogen alloy stainless steel ring, and a grade 5 titanium alloy back cover. With these three elements, the case size has been increased to 44mm. The Deepsea is characterized by a larger case with a heavier exterior, while the Sea-Dweller has a Cyclops lens with a date display and a slightly smaller case than the Deepsea. In addition, the material of the helium gas escape valve has been changed from titanium alloy to Rolex's proprietary 904L stainless steel (Oystersteel), the bezel has also been changed from stainless steel to Cerachrom black bezel, and the 1-minute scale is platinum. has been given a special coating. The waterproof performance is 3900m waterproof, which is more than three times that of the Sea-Dweller.
The buckle features a Glidelock clasp that can be adjusted up to 20mm in 2mm increments without the use of tools, and a Fliplock extension link that allows the bracelet to be extended up to 26mm. The movement is Cal.3135 like Ref.16600, but the balance spring uses the Blue Parachrom balance spring that Rolex independently developed. The luminous paint has been changed from Super-LumiNova to Chromalight, Rolex's own product, and the amount of light emitted has been doubled for up to 8 hours, changing from green light to blue light.

There are some rare models with the D-Blue dial. The first is the "Panchira Dial" where the "DEEPSEA" logo is printed out of alignment and the white background is slightly visible. It is an individual that also exists in the Submariner Ref.1680 (commonly known as the red sub) with a red logo. The second is “Lime” and “Gekko” with different letter colors and thicknesses, as well as the “DEEPSEA” logo. "Lime" is light green with thick letters of "DEEPSEA" and thin letters under "SEA-DWELLER", and "Gecko" is slightly dark green with thin letters of "DEEPSEA" and "SEA-DWELLER". The lower letters are in bold. By the way, gecko means gecko in English "Gecko".