This Audemars Piguet Royal Oak Perpetual Calendar is designed in a 41mm black ceramic case and octagonal bezel. It features the 'Grande Tapisserie' pattern on the slate grey dial equipped with counters displaying the day, date, month, astronomical moon, week of the year and leap year indication. The watch is complemented by a black ceramic bracelet with titanium AP folding-clasp. *The Audemars Piguet Royal Oak Perpetual Calendar 26579CE.OO.1225CE.01 is a discontinued model. This piece is in excellent condition and comes with the original box and original papers.