The Rolex Datejust is without a doubt one of the most distinguished watches in the Rolex Collection. Rolex is considered a pioneer of numerous innovations. Back in 1945, the Geneva watch manufacturer launched the Oyster Perpetual Datejust. As simple as sounds, the quick changing date was a milestone in the development of watches. The Datejust was the first self-winding, waterproof, chronometer wristwatch to display the date in a small window at the 3 o’clock position on the dial. This Rolex Datejust 278240 is presented with a 31mm stainless steel case with a domed bezel. The elegance of this Datejust 278240 is its simple yet elegant black dial, decorated with roman numeral hour markers. The Datejust 278240 features a stainless steel oyster bracelet that symbolizes the elegance delivered by Rolex tradition, combining everyday comfort and durability. The Datejust 278240 is also water resistant down to 100 meters, and it has a power reserve of approximately 55 hours. The Datejust 278240 is the essence of Rolex: simple, reliable, rock-solid, very well made and designed as a Rolex should be.