The Rolex DAY-DATE 40 OYSTER, 40 MM, PLATINUM is an iconic timepiece. Its distinctive fluted bezel is a mark of distinction, crafted from platinum for an elegant look. Originally designed to ensure waterproofness, its fluting is now a signature feature of Rolex watches. The Oyster case creates a strong, watertight seal and is topped by a winding crown that uses a triple lock waterproof system. This design innovation ensures the Rolex DAY-DATE 40 OYSTER, 40 MM, PLATINUM is reliable, durable, and the ultimate in luxury.