Precious Materials

Style of the Day-Date

The Day-Date has always embodied prestige and exclusivity. A hallmark of its nobility, the Day-Date’s Oyster case is produced exclusively in 950 platinum or in 18 ct gold. The bezel can be fluted, smooth or, on the gem-set versions, arrayed in the most beautiful of precious stones.
A choice of unique dials in refined colours and textures enhances this timeless symbol of excellence.



Spirit of the Day-Date

Rolex watches have long been associated with those who have, over time, guided the destiny of the world. No matter how different their vision, their field of excellence or their achievements, many of these exceptional men and women have one thing in common: the Day-Date.

Oyster Case


The Oyster case is guaranteed waterproof to a depth of 100 metres (330 feet). Its middle case is crafted exclusively from a solid block of 950 platinum or 18 ct gold. The fluted case back is hermetically screwed down with a special tool exclusive to Rolex.

Another core component in the watertight structure is the winding crown fitted with the patented Twinlock double waterproofness system, which screws down securely against the case. The sapphire crystal is clamped tight by the bezel. The Oyster case provides the high-precision Rolex movement with optimal protection from water, dust, pressure and shocks.

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Parachrom hairspring
pa • ra • chrom
  1. Rolex’s exclusive beating heart for mechanical movements, central to their precision.
  2. Made of a patented alloy of niobium, zirconium and oxygen, specially developed by Rolex for this strategic component.
  3. Insensitive to magnetic fields and temperature variations, and 10times more resilient to shocks than traditional hairsprings, making it more accurate and reliable.
  4. Entirely manufactured by Rolex with micron precision.
  5. Its signature blue colour is a tribute to watchmaking excellence.
  6. Tradition enhanced through cutting-edge innovation.
  7. The Rolex Way.
3155 Movement

3155 Movement


The Day-Date is equipped with calibre 3155, a self‑winding mechanical movement entirely developed and manufactured by Rolex. It features a day and date calendar disc mechanism. Like all Rolex Perpetual movements, the 3155 is a certified Swiss chronometer, a designation reserved for high-precision watches that have successfully passed the Swiss Official Chronometer Testing Institute (COSC) tests. Its architecture, in common with all Oyster watch movements, makes it singularly reliable.

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Certified Swiss Chronometer


The four simple words Superlative Chronometer Officially Certified on a Rolex watch dial mean that the very movement inside the timepiece has endured 15 days and nights of testing by COSC (Contrôle Officiel Suisse des Chronomètres – Swiss Official Chronometer Testing Institute), an independent not-for-profit association. To receive COSC certification as a Swiss chronometer, a watch must demonstrate extreme precision in a variety of positions and temperatures. Rolex is unique in the industry: this is the standard level of quality required of every Rolex wristwatch movement.


The Day-Date

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