Top chronometer certification: Swiss Chronometer Certification (COSC) + Rolex certification (when the movement is in the case)
Black dial
The Air-King has a personalized black dial with large Arabic numerals at 3, 6 and 9 o'clock and a prominent minute scale for easy reading when sailing. On the dial are the words "Air-King", in a font designed for the original model in the 1950s.
OYSTER STEEL
Rolex uses OYSTER STEEL to forge its steel cases. The OYSTER steel developed by the brand belongs to the group of 904L steels, an alloy widely used in high-tech, aerospace and chemical industries, and therefore necessarily highly resistant to corrosion. OYSTER STEEL is extremely durable and shines brilliantly when polished, even in extreme environments.
OYSTER STRAPS
Solid and comfortable, the Oyster bracelet combines form, function, aesthetics and technology. It is equipped with an OYSTER safety clasp that prevents accidental opening, as well as an easy-to-adjust chain extension system that is also unique to Rolex. With this ingenious device, which is unique to Rolex, the wearer can extend the bracelet by approximately 5 millimeters for comfort in all conditions.