As far as the design, development and production stages of the Rolex bracelets and buckles are, the toughest the tests require the advanced high technology. And as with all components of the watch, the aesthetic controls made with human eyes guarantee perfect beauty. The Oyster bracelet is a perfect alchemy of shape and function. This durable and cozy metal bracelet, first wired to the market in the late 1930s with a wide, flat three-piece connection, is still the most common bracelet in the Oyster collection. The Cosmograph Daytona is equipped with a caliber 4130, a mechanical chronograph mechanically developed and manufactured entirely by Rolex. The architecture has far fewer parts than a standard chronograph, which increases the reliability of the mechanism. Like all Rolex Perpetual mechanics, the 4130 also has a Swiss chronometer certificate awarded to high-precision wristwatches that pass the Swiss Official Chronometer Test Institute (COSC) tests successfully. The chronograph mechanism includes a Parachrom balance spring that offers higher resistance to shocks and temperature changes.
904L stainless steel case with a stainless steel Rolex oyster bracelet. Black monobloc cerachrom ceramic bezel with engraved tachymeter markings. Black lacquer, grey snailed counters dial with silver-tone hands and index hour markers. Minute markers around the outer rim. Dial Type: Analog. Chronograph-three sub-dials displaying: 60 seconds, 30 minutes and 12 hours. Rolex caliber 4130 mechanical movement with a 72-hour power reserve. Scratch resistant sapphire crystal. Screw down crown. Solid case back. Case size: 40 mm. Round case shape. Oysterlock clasp. Water resistant to 100 meters / 330 feet.