Some elements may glow in the dark. This Steel Rolex Sea-Dweller Deepsea Deep Blue James Cameron Replica Watch has a strong and masculine look and feel. It’s partly thanks to the slim numeral markers on the bezel, which allow the diver to measure time elapsed. And the steel Oyster bracelet and titanium caseback. But the two-colour gradient dial that merges deep blue into black just like the ocean itself, leave you in no doubt that this is not child’s play. It’s a serious and beautiful tool that’s also damn cool.

It’s a decompression chamber designed for deep saturation dives that allows the gas that builds up on the ascent to escape quickly without affecting the waterproofness of the Rolex Sea-Dweller Deepsea Deep Replica Watch. The spring on the valve opens when the pressure difference is 3 to 5 bars. Then you’ve got the ringlock system and the case design. They work in tandem to protect the whole watch from exploding at depths of up to 3,900 m and pressure up to 3 tons.

There are so many things about this superlative chronometer that make it special. The first Rolex Deepsea premiered in 2008. This is the new and much improved version.

Now, for a dive watch to actually be fit for purpose, you absolutely must be able to do one very simple thing: tell the time at a glance in the darkest of spaces. Blue luminescence solves that problem. Rolex Sea-Dweller Replica Watch call it the ‘Chromalight display’. Basically, the zero marker on the diver’s rotating bezel, and the hour markers, and hour and minute hands on the dial have a blue glow that’s visible in dark ocean conditions. While we’re looking at the dial, I’ll point out the date aperture at 3 o’clock and the prominent rehaut ring. Whether or not the latter is too large comes down to personal taste.

At 44 mm wide, it’s the largest Rolex Replica Watch dive watch to date. It’s the best in terms of performance. And it has a new D-Blue dial. Making a dive watch that doesn’t resemble a child’s toy is challenging in itself because it needs to be big and it must be bold. Numerals are oversized. Colours pop. When you release a dive watch to celebrate such a momentous event, you’d better be sure it won’t explode under massive water pressure. Rolex did their homework on that score. The domed sapphire crystal that shields the dial is 5 mm thick. The helium escape valve is one of the most important technical features.