Rolex 136660 Sea-Dweller Deepsea D-Blue Dial 44mm Stainless Steel

The Rolex 136660-0003, widely known as the Deepsea, is a true masterpiece of horology. Specifically designed for deep-sea divers and professionals, this timepiece offers unparalleled reliability and accuracy for those exploring the depths of the ocean.

The case of this remarkable watch is crafted from Rolex’s patented Oystersteel, a material that is both highly resistant to corrosion and incredibly durable. With a 44mm case diameter, it fits comfortably on most wrist sizes. The case architecture features the exclusive Rolex Ringlock System, engineered to withstand extreme pressure at great depths. For added safety, this system includes a helium escape valve, allowing helium to safely exit the watch during deep-sea dives.

The unidirectional, rotatable bezel comes with a 60-minute graduated scale and a scratch-resistant Cerachrom insert made of ceramic. The numerals and graduations are coated in platinum, offering a stunning contrast against the black background while ensuring excellent legibility even in low-light conditions.

The screw-down winding crown is equipped with Rolex’s Triplock triple waterproofness system, enabling the watch to resist water pressure down to an astounding depth of 12,800 feet (3,900 meters). The crystal is made from scratch-resistant sapphire, prized for both its durability and clarity.

The deep blue dial features luminescent hour markers and hands, providing optimal visibility in any lighting condition. The date window is positioned at 3 o’clock, with Rolex’s signature Cyclops lens, which magnifies the date display by 2.5 times for easy reading.

Powering the 136660-0003 is Rolex’s in-house caliber 3235—a self-winding mechanical movement equipped with a paramagnetic blue Parachrom hairspring and offering a power reserve of approximately 70 hours. The movement is COSC-certified, meaning it has passed the rigorous testing standards of the Swiss Official Chronometer Testing Institute, ensuring precision and reliability.