Black Bay 54While the Black Bay line references a range of TUDORs early dive watches, the all new Black Bay 54 is the most true to form example of TUDORs first dive watch, the reference 7922. The 37mm case retains the classic proportions of yesteryear yet boasts the technical prowess of TUDORs time only Manufacture Caliber MT5400 and a 200m depth rating. True to form, the unidirectional bezel is devoid of any graduated hash marks, echoing the days of the early