![]() ![]() A special mix of breathing gases with a high helium content makes it possible for divers to stay under the sea for periods of several days or even weeks, and avoid the toxic effects on the human body of pressure at great depths. One of these new methods, designed for divers working on undersea infrastructures, for example, was “saturation” diving. The principle was taken a step further in 1970: the Triplock winding crown, comprising an additional sealed zone, reinforced the waterproofness of the watches on which it was fitted – among them its models designed for diving.ĭuring the 1960s, techniques were developed that made extended dives possible at ever greater depths. In 1953, Rolex introduced the Twinlock winding crown, which incorporated a patented system with a double seal. The crown on the original Oyster case screwed down onto the middle case. ![]() On the current divers’ watches, depending on the model or version, the case back is made of Oystersteel or 18 ct gold. The back of the Oyster case was edged with fine fluting – as it still is today – enabling it to be screwed down hermetically against the middle case. The technical changes brought to the case also made it possible for a rotatable bezel to be fitted, on divers’ watches in particular. In following years, the architecture of the Oyster case evolved to become more robust and reliable. The bezel on the original Oyster case was fluted, allowing it to be screwed down onto the middle case using a tool exclusive to Rolex. After Gleitze’s gruelling swim in the bitterly cold waters, a journalist for The Times newspaper reported that she “carried a small gold watch, which was found to have kept good time throughout.” Learning that Mercedes Gleitze, a young secretary from Brighton, England, was preparing to swim across the English Channel and, if successful, would become the first British woman ever to achieve this feat, he asked her to carry an Oyster with her to demonstrate that the watch was completely waterproof. To promote the exceptional qualities of his Oyster watch, the following year Hans Wilsdorf decided to do something innovative. Hans Wilsdorf chose to call the watch – as well as its case – the “Oyster” because of the fact that “like an oyster, it can remain an unlimited time underwater without detriment to its parts.” This invention marked a major breakthrough in the history of watchmaking. A system of screwing down the bezel, case back and winding crown against the middle case ensured that the case was hermetically sealed and protected the inside of the watch from harmful elements on the outside. ![]() Japanese quartz watches can be equipped with a chronograph or a multifunctional date.The Oyster case, the fruit of these efforts, was patented four years later in 1926. Highly sought-after models combine the attractive appearance of steel cases with often slightly extravagant dials and classic leather or steel straps. Everything is adapted to girlhood and wearable elegance - from working with materials to the trendy image that Guess watches create around themselves and their owners. Like handbags, jewellery and sunglasses, Guess wristwatches are aimed primarily at female clients. In the same year, the founders sold half of the company to Jordache, and this step is accompanied by the launch of the first Guess watches. The incredible demand for the brand's products required an expansion in capacity in 1983. The originality and creative approach were inherent in every Guess product, and the Marciano brothers were aware of their qualities. Guess denim was revolutionary at the time - softer, lighter and coloured differently than usual. The main selling item in their first boutique in Beverly Hills was and still is denim goods. The California brand Guess was founded in 1981 by Moroccan brothers Paul and Maurice Marciano. ![]()
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