Tudor is launching a unique new version of its popular Black Bay Fifty-Eight model in 925 silver with an open case back. This marks two firsts for a Tudor divers' watch and creating surprising incandescence. The name of the radiant Black Bay Fifty-Eight 925 model is, of course, a reference to the precious metal of its case, but also to 1958, the year in which the first Tudor divers' watch waterproof to 200 meters —660 ft—, reference 7924 or "Big Crown," was introduced.