https://www.hodinkee.com/articles/omega-seamaster-planet-ocean-ultra-deep-professional-deepest-diving-watch The Omega Seamaster Planet Ocean Ultra Deep Professional Becomes The Deepest Diving Watch Ever] Due to a technical problem the watch fixed to the ultra-deep-sea lander stayed on the bottom for two days before it and the lander were salvaged from an unrevised depth of 10927 meters . [