Swiss luxury watch manufacturer Tudor has gone to new depths with its Tudor Pelagos watch. Waterproof up to a whopping 500 metres (1,640ft), Tudor Pelagos is easily being hailed as the ultimate diver’s watch. Its lightweight titanium case, auto-adjusting clasp, Manufacture Calibre MT5612 movement with 70-hour power reserve and fully luminescent display make it the timepiece of choice when in deep waters, even in the darkest and most extreme of conditions.

Not one to take things at face value, famous French free-diving champion Morgan Bourc’his himself tested the Tudor Pelagos timepiece under trying conditions – exploring the dark waters under ice high up on the French Alps, in numbing cold and with almost no light. Let’s see how the watch performs in the video below: