Deepest watch (Prototype)

10,925 m (35,843 ft) (verified by DNV GL) — Omega Seamaster Planet Ocean Ultra Deep Professional. Two of the Omega timepieces were strapped to the manipulator arm of the DSV Limiting Factor during its record dive to the bottom of the Challenger Deep on April 28th, 2019. A third watch was strapped to a lander that the submersible, piloted by Victor Vescovo, joined on the seafloor. The record-setting watch will not be released for sale to the general public and is thus considered a prototype. (DSV: Deep submergence vehicle)

All of the watches were pressure tested at Triton Sub’s facility in Barcelona with the attendance of a DNV GL surveyor. The chosen maximum pressure is equivalent to the depth of the Mariana Trench, but to be extra sure and to comply with dive watch standards, OMEGA insisted on adding a 25% safety margin, which meant the watches had to perform perfectly at an astonishing 1500 bar / 15,000 m. (21,756 PSI / 49,213 ft). — Omega | World’s Deepest Watch

PREVIOUS RECORD: On January 23, 1960, a ROLEX Deep Sea Special third-generation prototype watch was strapped to the bathyscaphe Trieste which descended to 10,916 m (35,814 ft) in the Challenger Deep (Mariana Trench). The watch returned to the surface in perfect working order. The Challenger Deep is the deepest known point on earth with a hydrostatic pressure of 16,000 PSI (1,089 ATM). PSI: Pounds per square inch. ATM: Unit of pressure roughly equal to the average atmospheric pressure at sea level on Earth.

The ROLEX Deepsea Challenge experimental watch was created for James Cameron’s record solo dive in the Challenger Deep. On March 26, 2012, it was observed working precisely on the Deepsea Challenger‘s manipulator arm at a depth of 10,898 m (35,756 ft).

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EDITOR’S NOTE
The depth of 35,797 feet in the ROLEX ad in the photo gallery was later revised to 10,916 m (35,814 ft).