Audemars Piguet - Blue Ceramic Royal Oak Perpetual Calendar Audemars Piguet launched the first Royal Oak Perpetual Calendar watch, its case and bracelet are made of blue ceramic. Ceramic is virtually scratch-resistant and can withstand high temperatures and thermal shock, but its ultra-hardness presents a huge challenge for manufacturers because multiple operations are required to achieve a uniform appearance, which affects cost. Its signature octagonal bezel is secured by eight visible hex screws and the case measures 41mm x 9.5mm. Despite the screw-down crown, water resistance is only guaranteed to a pressure of 2 bar (approximately 20 meters/66 feet). White gold applied hour markers and Royal Oak hands are coated with Super-LumiNova, which stands out against the blue color of the “Grande Tapisserie” dial, subdials and inner bezel. In addition to time, the Royal Oak Perpetual Calendar also indicates the day of the week, date, month, astronomical moon, day of the year (on the outer ring of the dial) and leap year. Through the transparent sapphire crystal of the titanium case back, the inner movement 5134 can be seen beating at an unusual frequency of 2.75 Hz (19,800 vibrations per hour) and guarantees a power reserve of 40 hours, which means that if you need to wind it every day To keep the perpetual calendar indications up to date. An integrated ceramic bracelet secures the wrist with a titanium folding clasp. Wholesale replica watches Review replica watches replica watches online high quality cheap watches Discount replica watches replica Richard Mille RM 27