At Rolex, form and function are often closely intertwined. The fluted bezel, one of the most iconic Rolex details, originally had a practical purpose, serving to screw the bezel down onto the case to ensure the waterproofness of the watch. As the bezel evolved, the fluting became a purely aesthetic feature. All fluted bezels on Rolex watches are exclusively made in 18 ct gold, since gold is the only material with which one can achieve that impeccable fluting and ensure special brilliance thanks to the perfect play of light on their surface.