The Oyster Perpetual Day-Date 36 watch in 18 ct Everose gold, with a diamond-set rhodium white dial, a triangular pit pattern outer ring, and a President strap.
The day-of-the-week calendar launched in 1956 was the world's first watch to display the full week of the week.
The Rolex fluted bezel is a mark of distinction. Originally, the fluting of the Oyster bezel had a functional purpose: it served to screw the bezel onto the case helping to ensure the waterproofness of the watch. It was therefore identical to the fluting on the case back, which was also screwed onto the case for waterproofness, using specific Rolex tools. Over time, the fluting became an aesthetic element, a genuine Rolex signature feature. Today the fluted bezel is a mark of distinction, always in gold.