Pioneering Design The Rolex Oyster Perpetual 36 draws its lineage from the pioneering Oyster case, the worlds first waterproof wristwatch. With its clean lines and reliable performance, it remains a timeless expression of Rolexs design ethos. Refined Aesthetics This 2012 reference 116000 features a 36mm Oystersteel case with a blue dial punctuated by three Arabic numerals. Powered by the calibre 3130 automatic movement, it offers a 48-hour power reserve. The Oyster bracelet is secured with an Oysterclasp for comfortable daily wear.