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The Day-Date model 6511 was introduced at Basel fair in 1956. It features a window at 12 spelling the day out in full, allied to the Cyclops date window at 3 o’clock. Even though as the Datejust model, this one was available only in 18 Kt gold or platinum but it was a introduced with a new matching “President” bracelet and that is why it was significantly more expensive than the previous models. The Day-Date model features automatic movement and an additional day and date discs and screwed back. When model 6511, was replaced by 6611, the Day-Date started featuring the new calibre 1055, which, with its free sprung Micro-Stella balance, enabled the new watch to become the first Rolex model to bear the legend “Superlative Chronometer Officially Certified” on its dial.
When Rolex gave on of these with the designed concealed clasp bracelet to the then-president Dwight D. Eisenhower, the Day-Date started being called the “President”. In order to complete the creation of this major watch Day-Date or by this time President model, Rolex introduced a new case reference number system which is still used nowadays. This new 5th digit added to the model delineated the materials in the watch as it left the factory enabling potential buyers to determine that the timepiece was not a replica.

0 = Stainless steel (not stainless and gold)
1 = Yellow gold – filled
2 = White gold – filled
3 = Steel and tallow gold
4 = Steel and white gold
5 = Gold shell
6 = Platinum
7 = 14 kt gold
8 = 18 kt yellow gold
9 = 18 kt white gold

The newest Day-Date model was introduced at the en of the 90s: the Double Quick Set feature that made possible aligning both the day and date into their proper positions easily. The “Crown collections” are the most expensive watches in Rolex production featuring an expanding variety of precious stones.


Filed under: Rolex, Rolex Chronograph, Rolex Datejust, Rolex Day Date, Rolex Day Date President, Rolex Explorer, Rolex Lady's Watches, Rolex Movements, Rolex Oyster, Rolex Perpetual, Rolex President, Rolex Prince, Rolex Quartz Watches, Rolex Sea Dweller, Rolex Submariner, Rolex Watch, rolex watches,

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