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  2. Rolex Sea-Dweller - Wikipedia

    en.wikipedia.org/wiki/Rolex_Sea-Dweller

    Rolex Sea-Dweller 4000 reference 16600 produced between 1989 and 2009 with a 1,220 m (4,000 ft) depth rating. The Rolex Oyster Perpetual Date Sea-Dweller is a line of diver's watches manufactured by Rolex, with an underwater diving depth rating of 1,220 meters (4 000 ft) and up to 3,900 metres (12,800 ft) for the Sea-Dweller Deepsea variant. In ...

  3. Robert A. Barth - Wikipedia

    en.wikipedia.org/wiki/Robert_A._Barth

    Robert August Barth (August 28, 1930 – March 26, 2020) was a United States Navy Chief Quartermaster, pioneering aquanaut and professional diver. He was the only diver to participate in all U.S. Navy SEALAB missions led by George F. Bond. [1]

  4. Helium release valve - Wikipedia

    en.wikipedia.org/wiki/Helium_release_valve

    Some watch manufacturers manage the internal overpressure effect by simply making the case and sealed connected parts adequately sealed or strong enough to avoid or withstand the internal pressure, [1] but Rolex and Doxa S.A. approached the problem by creating the helium escape valve in the 1960s (first introduced in the Rolex Submariner/Sea-Dweller and the Doxa Conquistador): A small, spring ...

  5. Diving watch - Wikipedia

    en.wikipedia.org/wiki/Diving_watch

    In January 1960, a Rolex Deep Sea Special prototype diving watch attached to the hull of the bathyscaphe Trieste reached a record depth of 10,913 m (35,804 ft) ±5 m (16 ft) of seawater during a descent to the bottom of the "Western Pool" of the Challenger Deep, the deepest surveyed point in the oceans. The watch survived and tested as having ...

  6. Rolex Submariner - Wikipedia

    en.wikipedia.org/wiki/Rolex_Submariner

    The Rolex Sea-Dweller, developed in 1967 but introduced to the general public in 1971, is a heavier-duty steel version of the Submariner, with a thicker case and crystal, as well as a date feature, minus the date magnifying lens ("cyclops"). The Sea-Dweller incorporates a helium escape valve for use when decompressing and helium is in the gas ...

  7. The mysterious, mathematical origins of the world’s most ...

    www.aol.com/news/mysterious-mathematical-origins...

    Weaving a history. One of the earliest depictions of the flag comes from sketches by Henry Ambrose Oldfield, a British doctor and artist who lived in Nepal in the mid-1800s.

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