Guaranteed waterproof to a depth of 3,900 metres (12,800 feet), at its launch in 2008 the Oyster Perpetual Rolex Deepsea inaugurated the Ringlock system – a unique case architecture that allows the watch to withstand the pressure exerted at this extreme depth. Released in 2022, the Oyster Perpetual Deepsea Challenge also benefits from this exclusive construction. This watch, crafted from RLX titanium, is waterproof to the phenomenal depth of 11,000 metres (36,090 feet).