The Day Date earned the nickname the “President” when Rolex reportedly gave one to the then President of the United States Dwight Eisenhower. In 1977 caliber 3055 (quick-set) was introduced in model 18038 and in 1988 caliber 3155 (double quick-set) was introduced in model 18238.Ĭaliber 3155 is the caliber still used today in all Day-Date models. In 1959 caliber 1055 was replaced with caliber 1555 in model 1803 and later in 1965 – model 1803 received caliber 1556. The 6611 featured the new caliber 1055 movement the first to be labeled “Superlative Chronometer Officially Certified” on the dial, and had a new accuracy standard guaranteed to remain within + 3 seconds a day. Rolex’s 6611 models that were waterproof up to 100 feet soon replaced the Day Date but it was still externally identical to the 6611. Because of these unique features, the “Rolex Day-Date” soon became the flagship model for Rolex. The Rolex Day-Date was released in 1955 and had many features that were considered ahead of its time, including an automatic movement, plus day and date discs.
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