2019 Royal Oak Perpetual Calendar Openworked Black Ceramic

As a follow up to the Royal Oak Perpetual Calendars Black Ceramic that was introduced by Audemars Piguet in 2017, the Le Brassus manufacture this week debuted a new open-worked version, which is otherwise the same as its predecessor The Royal Oak Perpetual Calendar Openworked Black Ceramic is presented in a sleek 41 mm x 9.9 mm black ceramic case which features intricate satin-brushing on the entire case and bracelet, with the exception of the beveled edges of the case, bezel, caseback, and bracelet, which have been polished Underneath a sapphire crystal dial is in-house movement caliber 5135, which is a skeletonized version of caliber 5134, that powers the aforementioned Royal Oak Perpetual Calendar Black Ceramic from 2017.

The movement is wound by a skeletonized rose gold oscillating weight, beats at a frequency of 2.75Hz, has 374 components, 38 jewels, and a 40-hour power reserve The watch functions include hours, minutes, seconds, and a perpetual calendar Baton-shaped hands indicate hours, minutes, and seconds like the previous model but this time they're in rose gold, as are the applied indices, and subdial surrounds. Source