Rolex Oyster Perpetual Day-Date 40 features a polished 18kt yellow gold case. Polished 18kt yellow gold Twinlock crown. Polished 18kt yellow gold fluted (wave design) bezel. Dial: Champagne dial, Polished yellow gold hands, 10 baguette diamond hour markers, and Fine printed minute/seconds track. Features: Day of the week window displayed at the 12 o’clock position, Date window displayed at the 3 o’clock position with a cyclops magnifying lens, and Instant & simultaneous day & date change at midnight. Rolex in-house calibre 3255, beats at 28,800 vph, contains 31 Jewels & has an approximate power reserve of 70.