Day-Date

From the retailer listing

Fluted bezel 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, in platinum on this Day-Date 40. Ice-Blue Dial The ice-blue dial is the discreet and exclusive signature of a Rolex platinum watch. Rolex uses platinum, the noblest of metals, for the finest of watches. This exclusive dial colour can be found only on the Day-Date, the Cosmograph Daytona, the Perpetual 1908 and the Land-Dweller. Platinum Rare and precious, platinum is striking for its silver