Tudor is launching a unique new version of its popular Black Bay Fifty-Eight model in solid 18K yellow gold with an open case back. Just like with the new Black Bay Fifty-Eight 925, the release of a watch in gold marks another two firsts for a Tudor divers' watch. Among other aesthetic nods to this historical watch, this model offers a case 39 mm in diameter in keeping with the characteristic proportions of the 1950s.