Rolex Day-Date Reference 18038 Blue Sapphire String DialOld blue eyesThis Day Date manages to be both bling bling and yet understated not an easy feat. The watch houses a very special string dial. The string refers to the line of small diamonds that circle the dial inside the hour markers, which themselves are set with stunning sapphires. This is a seriously cool watch and perfect for the festive season! The single quick Day Dates were introduced in 1977 and are actually a little thicker than the later