The fluted bezel is a distinguishing feature. The Oyster bezel's fluting originally served a practical function by screwing the bezel onto the case, which helped to guarantee the watch's waterproofness. As a result, it was the same as the fluting on the case back, which was also screwed onto the case with specialized tools for waterproofing. The fluting evolved into a true signature feature and an aesthetic element over time. These days, the Lady-Datejust's gold fluted bezel is a symbol of distinction.