Oyster Perpetual Datejust 41 in Oystersteel and Everose gold features a chocolate dial and an Oyster bracelet 126331 Chocolate Self windingmechanical Presenting affirmed lines alongside an index(es) and bezel Presenting affirmed lines alongside an elegant silhouette The model is also available with a sunrayed white dial or a sunrayed white dial with a yellow gold PVD plated case The sunray finish creates delicate light reflections on many dials in the Oyster Perpetual collection 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