Pre-owned Rolex Sea-Dweller ref. 116660 (2008 – 2009) is the model that elevated Rolex’s dive watch engineering to a completely different level. Introduced in 2008 as the first Deepsea, it took the standard Sea-Dweller concept and more than tripled the depth rating to 3,990 meters. This isn’t just a bigger Submariner. It’s developed around the Ringlock system, a visible inner compression ring that works with a thick sapphire crystal to handle extreme pressure. The black dial is classic and straightforward, paired with a Cerachrom bezel and Chromalight lume for excellent low-light legibility. Despite its size, the case is still wearable for what it is. The 116660 marks the beginning of the Deepsea story. Shop Rolex Sea-Dweller Collection