This watch would form the basis for the Rolex Explorer (designed for Sir Edmund Hillary's Mount Everest expedition), the Rolex Submariner, and the Rolex Sea-Dweller. Datejust watches of this type have been nicknamed "Thunderbirds". ![]() It featured a rotating bezel marked to 60 minutes, which can be used to measure time intervals. The Turn-O-Graph model was introduced in 1955 as an award given to US Air Force pilots returning from combat missions. Subsequently, various sizes including ladies' and mid-sized versions were made available. The original Datejust was launched with a case size of 36mm. The Datejust is offered with two Rolex bracelets: the Jubilee and the Oyster. Over the years, the Datejust saw an expansion of its design options as well as improvements to its movement, from a gradual date change shortly before midnight in the earliest versions to an instantaneous change beginning in 1955. ![]() ![]() ![]() It also featured the company's waterproof Oyster case (first introduced in 1926 ), a fluted bezel, and the new Jubilee bracelet (so named for the occasion). It was available only in 18 karat yellow gold and had a small bubble back winder with a deeply domed back. Rolex introduced the original Datejust (reference 4467) in 1945 to celebrate the company's 40th anniversary.
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