![]() This means, in Rolex language, that it’s a Twinlock crown. The Oyster case is water-resistant to 100 metres, a feature that is usually indicated with a horizontal bar underneath the Rolex logo on the crown. This bracelet was created especially for the launch of the prestigious Oyster Perpetual Day-Date in 1956, and this three-piece link President bracelet is still reserved exclusively for the Day-Date and precious metal versions of the Datejust. The Day-Date 40 comes in the recognisable Oyster case, measures 40mm in diameter, and comes on the equally recognisable Presidential bracelet. ![]() Of course, the movement is equipped with the blue Parachrom hairspring, which is not only insensitive to magnetism, but also up to 10 times more precise than a traditional hairspring in case of shocks. This escapement combines high energy efficiency with great dependability and is also insensitive to magnetic fields because it’s made of nickel-phosphorus. The calibre 3255 also meant a longer power reserve of 70 hours, which was achieved (among others) by Rolex’s Chronergy escapement. ![]() The calibre 3255 introduced at Baselworld 2015, a new generation movement with no fewer than 14 patents! ![]() And that was a magnificent feat! The calibre 3255 is still used in the Day-Date and still offers a guaranteed precision that is more precise than the well-known COSC standard. Covered by the Superlative Chronometer certification that was redefined by Rolex in 2015, it meant a −2/+2 seconds deviation per day. The innovative factor remains since the movement inside, calibre 3255 introduced in 2015, meant a giant leap forward for precision. ![]()
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January 2023
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