Rolex 136660 Sea-Dweller Deepsea D-Blue Dial 44mm Stainless Steel Men’s Watch

The Rolex 136660-0003, also known as the Deepsea, is a true masterpiece of horology. It is a timepiece that was specifically designed for deep-sea divers and professionals who need a reliable and accurate instrument on their wrist while exploring the ocean’s depths.

The case of this watch is made of Rolex’s patented Oystersteel, which is highly resistant to corrosion and extremely durable. The diameter of the case measures 44mm, which makes it a perfect fit for most wrist sizes. The case architecture features a unique Rolex Ringlock System, which is designed to withstand extreme pressure at great depths. This system also includes a helium escape valve, which allows any helium that may have entered the watch during deep-sea diving to escape safely.

The bezel of the 136660-0003 is unidirectional and rotatable, with a 60-minute graduated scale, and features a scratch-resistant Cerachrom insert made of ceramic. The numerals and graduations are coated in platinum, which not only provides a stunning contrast against the black background but also ensures legibility in low-light conditions.

The winding crown of this timepiece is screw-down, with the Triplock triple waterproofness system, which ensures that the watch is water-resistant to a depth of up to 12,800 feet or 3,900 meters. The crystal is made of scratch-resistant sapphire, which is known for its durability and clarity.

The dial of the 136660-0003 is deep blue and features luminescent hour markers and hands, making it easy to read in any lighting condition. The date window is located at the 3 o’clock position and features the Cyclops lens, which magnifies the date display by 2.5 times, making it easier to read.

The movement of the 136660-0003 is powered by Rolex’s in-house caliber 3235, which is a self-winding mechanical movement that features a paramagnetic blue Parachrom hairspring and a power reserve of approximately 70 hours. The movement is also COSC certified, which means that it has passed the rigorous testing standards set by the Swiss Official Chronometer Testing Institute.