Everyday Classic The Rolex Oyster Perpetual 36 is a pure expression of the brands watchmaking heritage. With its clean lines and balanced proportions, it represents the essence of the Oyster collectiontimeless, versatile, and built to last. Refined Simplicity This 2015 reference 116000 features a 36mm Oystersteel case and is powered by the calibre 3130 automatic movement, offering a power reserve of approximately 48 hours. The Oyster bracelet is secured with the Oysterclasp for everyday comfort.