Perpetual calendar function since the beginning of the creation of Audemars Piguet has become one of the core of the brand complex functions tabulation. The emergence of this function also reminds people that all timekeeping techniques are derived from astronomical and natural cycles. In 2017, Audemars Piguet introduced a black ceramic perpetual calendar with a hand-finished finish, further enriching the Royal Oak Collection Calendar Collection. Black ceramic has excellent scratch-resistant abrasion resistance, and can withstand high temperature and thermal shock, to maintain the appearance of new, but for hand-decorated with high processing difficulty. To create materials that are uniform, dense, extremely hard and can be hand-retouched, watchmakers need a great deal of patience and skill. Dark gray "Grande Tapisserie" large plaid decorative dial with silver real oak pointer and time scale, and black ceramic case color harmony with, resulting in perfect reading clarity. The Au Valley, the birthplace of Aude, is located in the northern part of Geneva and forms a natural star-shrine because of its altitude of more than 1,000 meters. Audemars Piguet sit watch the world and the wonders of nature, relentlessly create outstanding performance, superb craftsmanship masterpiece of time, the mystery of nature and time. This dazzling sky over the valley of the Ru opened the initial pursuit of Audemars Piguet in complex watches. In 1955, Audemars Piguet produced the world's first calendar masterpiece with a leap year display Ref.5516. This epoch-making landmark project, the moon phase display at 6 o'clock and the 12 o'clock leap year display is undoubtedly one of two distinguishing features that you can see at a glance. The leap year display is divided into four-sided fan-shaped area to show the cycle of four-year leap. The 12-month year shows the sub-dial at 3 o'clock, making it even more visible and clear. Quartz crisis in 1978, Audemars Piguet launched the calendar function Caliber 2120/2800 self-winding movement - 3.95 mm thickness makes it the world's thinnest use of the central pendulum self-winding calendar movement calendar . Caliber 2120/2800 self-winding self-winding movement Audemars Piguet successfully rid of the quartz crisis for the traditional complex watch industry, inject new hope, is generally considered epoch-making significance. Caliber 2120/2800 self-winding movement In 1984, Audemars Piguet first for the Royal Oak watch equipped with Caliber 2120/2800 self-winding movement, the introduction of ultra-thin self-winding calendar watch. 1984 First Royal Oak Series Perpetual Calendar Ref. 554 Inherited love Audemars Piguet hundred years of mechanical watchmaking and complex processes perseverance, equipped with Caliber 5134 self-winding movement of the Royal Oak series perpetual calendar Audemars Piguet in the calendar area of ​​a new chapter. Based on the Caliber 2120/2800 self-winding movement, this new movement adds a weekly display of the outer bezel and features an accurate moon phase display with only one adjustment per 317 days in 125 days. This article is reproduced, does not represent the world position of million table.