In a span of 5 years from 1926 to 1931, Rolex and Hans Wilsdorf would create and patent two major horology milestones, which would forever set Rolex apart; the Rolex Oyster waterproof watch-case, and the Rolex Perpetual Movement. In 1925, Rolex would also create and register their famous trademark logo of the Rolex five-point logo crown.
The Art-Deco era was a time of tremendous growth for Rolex, so much so, there are many art-deco elements which remain today as part of their current design language.
The Rolex Oyster is perhaps the most revolutionary and profound development in watch history. The following patent application was filed by Hans Wilsdorf on behalf of Rolex in 1926:
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