The Rolex Deepsea Sea-Dweller 126660 is a remarkable timepiece, renowned for its impressive durability and functionality. This watch is designed for extreme depths, embodying Rolex's commitment to precision and resilience. 

With a case diameter of 44 millimeters, the 126660 is both robust and commanding. The watch is constructed from Oystersteel, a high-grade stainless steel alloy known for its strength and resistance to corrosion. Its distinctive design features a unidirectional rotatable bezel with a Cerachrom insert, which is virtually scratch-resistant and ensures that divers can keep track of their underwater time accurately.

The Deepsea Sea-Dweller 126660 boasts a helium escape valve, essential for deep-sea diving, allowing for the release of helium that can accumulate during extended underwater expeditions. The watch is also notable for its impressive water resistance of up to 3,900 meters (12,800 feet), making it one of the most robust diving watches available.

The dial of the 126660 is highly legible, featuring large luminescent markers and hands, with a prominent white date display at 3 o'clock. The Cyclops lens over the date ensures clear visibility. 

Overall, the Rolex Deepsea Sea-Dweller 126660 stands out not only for its technical achievements but also for its sleek, professional design, making it a top choice for both professional divers and watch enthusiasts who appreciate high performance and reliability in extreme conditions.

This watch has been serviced and is running well. It will be shipped with a one year warranty.