The first waterproof wristwatch "Oyster", 1926
The first wristwatch with an automatically changing date on the dial (Rolex Datejust ref.4467, 1945)[7]
The first wristwatch case waterproof to 100 m (330 ft) (Rolex Oyster Perpetual Submariner ref.6204, 1953)[13]
The first wristwatch to show two time zones at once (Rolex GMT Master ref.6542, 1954)
The first wristwatch with an automatically changing day and date on the dial (Rolex Day-Date, 1956)[14]
The first watchmaker to earn chronometer certification for a wristwatch