The Rolex Deepsea Sea-Dweller was first introduced at Baselworld in 2008, with its main purpose being to replace the exceptionally successful Sea-Dweller. From its very introduction, the model strongly polarized the opinions of Rolex enthusiasts, especially among dive watch lovers. Additional tension arose from the fact that with the launch of the DSSD, the brand announced the discontinuation of the Sea-Dweller, which led many dealers to place significantly larger orders. Subsequently, Rolex realized this decision was premature and in 2014, they introduced the new Sea-Dweller 4000.

The DEEPSEA impresses with a water resistance of up to 12,800 feet (3900 m), and the inspiration for the model comes from the legendary Rolex Deep Sea Special from 1960, created for an expedition to a depth of 10,916 meters. The DSSD has impressive dimensions – 44 mm in diameter and 17.7 mm in thickness, making it one of the brand's most massive models. Similar to the original Sea-Dweller, it features a unidirectional rotating bezel, a helium escape valve, and the absence of a "Cyclops" lens over the date.

The key difference from its predecessor is the Ringlock System – a unique construction that allows it to reach extreme depths. It includes a 5 mm sapphire crystal, an inner steel ring, and a case back made of Grade 5 titanium. Each watch is tested at a pressure corresponding to 16,000 feet – 25% above its official rating. As the pressure increases, the system "tightens" even further.

In 2012, James Cameron reached the Challenger Deep – the deepest point in the ocean – accompanied by a Deepsea. In honor of this event, Rolex created the D-Blue version, which is the model presented here.

The differences compared to the standard DSSD are mainly in the dial – a gradient from black to blue, with the "DEEPSEA" inscription in green. This look quickly turned it into one of the most sought-after models on the secondary market. Additionally, its production run was relatively short, which further intensifies the interest in it.

The dial is extremely legible, and the Chromalight luminescence provides a strong blue glow in low light. The model also uses a "Maxi dial" – with larger hands and indices for better visibility.

The case back is solid, made of titanium, engraved with the full model name. As is characteristic of Rolex, 904L steel is used, which offers higher resistance, especially in aggressive environments, and the finishing is of an exceptional level.

The bezel is a classic diver's bezel – designed for measuring time underwater. While on older models the insert was aluminum, here the ceramic material Cerachrom is used – tougher, more scratch-resistant, and with a richer luster.

One of the key reasons for the model's popularity is also its in-house Rolex Caliber 3135 movement, equipped with a Perpetual Rotor. It is known for its reliability, accuracy, and ease of maintenance. The Parachrom hairspring improves resistance and accuracy, and the Paraflex system increases shock resistance. The power reserve is over 48 hours.

The bracelet follows the classic three-piece link design, but the main difference compared to previous generations is in the clasp. It includes the Glidelock system for fine adjustment and a Diver extension for lengthening by up to 26 mm – extremely useful when worn over a wetsuit. The clasp is machined from a solid block of steel, which guarantees strength and durability.

All of this makes the Deepsea Sea-Dweller D-Blue one of Rolex's most impressive and technologically advanced dive watches – a model that combines engineering thought, extreme capabilities, and a strong presence.