![]() 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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