Titanium is the material of choice for the inner caseback on the Deepsea due to its strong corrosion-resistant properties and its ability to repeatedly flex under stress without developing the same degree of metal fatigue as steel. Since the crystal on the Deepsea will be subjected to the same extreme pressures as the caseback, its scratch-resistant sapphire crystal has been beefed up to be a massive 5.5mm thick, and it is crafted in a domed shape (without a Cyclops magnification lens) to better distribute the pressures being exerted on the face of the watch.Like both the Submariner and the normal Sea-Dweller, the Deepsea is equipped with Rolex’s Triplock winding crown that screws down and uses a system of gaskets to create three sealed zones to protect against moisture intrusion. Additionally, since the Deepsea is a variation of Rolex’s Sea-Dweller collection, its case is equipped with a helium gas escape valve, which allows the watch to safely be used for saturation diving applications.One of the hallmark characteristics of modern dive watches is the degree of the over-engineering present in their designs and the almost-ludicrously excessive performance-statistics that manufacturers are able to achieve. Although the Rolex Deepsea Sea-Dweller is easily the most capable and robust dive watch available in Rolex’s current catalog, only a very slim percentage of its owners will ever require even a small fraction of its incredible underwater functionality. Regardless, the Ringlock system and the case of the Deepsea are the perfect embodiment of form following function, as the watch was specifically designed from the ground-up to be the ultimate deep-sea diving timepiece.
The dial has a lot things worthy of talking. First it is about the high readability. White dial has thick black Arabic numeral hour markers, the minute markers are also in black color, it is very convenient for the wearer to catch time from the dial. The big triangle marker at 12 and hour markers at 3, 6 and 9 are applied with Swiss Superlume material, so in dark condition, you will find these four markers will emit a strong green light, this improves the dial readability. There are three working subdials, they are sunken from the main dial. Each small dial works well and features a blue hand. Among them, small seconds subdial is at 9 o’clock, 30-minute chronograph counter and 12-hour chronograph counter are positioned at 12 and 6 o’clock repectively. At 3 o’clock, next to the hour marker, there are two square windows, the left window is displaying current day, while the right window is showing date, both have black font. All hands on the white dial use blue color, not only eye-catching, but also give your eyes fresh outlook.
