Since the first Rolex Day-Date (reference 6511) was introduced at the Basel Fair back in 1956, it was an instant success. A year after its birth, the model was the first to be awarded with the prestigious “Superlative Chronometer Officially Certified” certification still used today – an embodiment of precision in the watch industry. The Day-Date was also the first waterproof, automatic wristwatch to offer a modern calendar on the dial. Rolex sums up the success of their 36mm model well with a caption that refers to the Day-Date on their website, “Worn by more presidents, leaders and visionaries than any other watch.” In fact, the watch eventually became known as the “President,” a term that is popular even in modern times. Consequently, it should come as no surprise that many feel that Day-Date is the ultimate status watch. Day-Dates come in gold or platinum and with either a leather, Oyster (3 flat links) or the traditional “President” (5 round links) bracelet.