Original Swiss watches Rolex Daytona Cosmograph 40mm Everose Gold

The case of the Cosmograph Daytona model with a diameter of 40 mm, which guarantees water resistance up to 100 meters, is an example of strength, perfect proportions and elegance. The fluted back cover is tightly screwed with a special Rolex key. The crown, equipped with the patented Triplock triple sealing system and protected by protrusions cut into the case ring, is tightly screwed onto the case, as well as the chronograph buttons. The glass is made of sapphire and scratch-resistant. The Cosmograph Daytona’s completely impenetrable body reliably protects the high-precision mechanism contained in it. The Cosmograph Daytona features a 4131 caliber, a chronograph movement with vertical gears and automatic winding, fully designed and manufactured by Rolex. Like all Perpetual movements manufactured by Rolex, the Calibre 4131 is certified by the Swiss Chronometer, issued to ultra-precise watches that have been successfully tested at the Official Swiss Institute of Chronometry (COSC). Its concept and workmanship give this model incomparable precision and reliability. The oscillator, the true heart of the watch, is equipped with a blue Parachrom balance spiral, patented by Rolex and made of a special alloy of niobium and zirconium. Completely immune to magnetic fields, this spiral can withstand thermal effects and maintain impact accuracy ten times better than a conventional spiral. The watch is equipped with a gold bracelet.