The Oyster Perpetual Day-Date 40 in 18K yellow gold, with a silver dial, a diamond-set bezel and a President bracelet. Gem-setting craftsmen, like sculptors, carefully craft the setting for each gemstone by hand using precious metals. The craftsman sets the gemstones with extremely precise skills. Each gemstone is precisely arranged and calibrated in its position to ensure that it is firmly decorated on the gold or platinum setting. Many of the dial styles in the Oyster collection feature sunray effects that reflect an elegant sheen. This effect requires excellent brushing techniques to create engravings that expand from the center of the dial outwards.