Day 6: The Watch of the Day

Rolex Deepsea

A watch developed for extreme depths, guaranteed waterproof to 3,900 metres (12,800 feet), the Rolex Deepsea required the design of a case with a unique architecture, the Ringlock System. This innovation patented by Rolex consists of a combination of three distinctive features:

• The high-performance ring Set inside the middle case of the watch between the crystal and the case back, the high-performance nitrogen-alloyed stainless steel ring withstands the pressure exerted by water on the crystal and the case back.
The middle case is made from 904L steel.

• The sapphire crystal To resist pressure, the synthetic sapphire crystal is slightly domed and substantially thicker than the crystals of other Oyster models.

• The case back The case back is made of a titanium alloy, an extremely resistant stainless material. It is held in place against the high-performance ring by means of a 904L-steel ring.

The helium valve is made of high-performance stainless steel. Its size is adapted to the dimensions of the case to achieve optimal waterproofness. The helium valve is a safety feature which, during the decompression phase, releases the gases that infiltrate into the watch during caisson dives.

The Triplock winding crown, equipped with three seals and screwed onto the case, completes this ingenious waterproof system.

Complete information about the Rolex DeepSea in the book:

Rolex Submariner Story