New Audemars Piguet Royal Oak Perpetual Calendar. 18-carat yellow gold case, glareproofed sapphire crystal and caseback, screw-locked crown, water-resistant to 20 m. REF. #26574BA.OO.1220BA.01. Case: 41 mm.
The Royal Oak Perpetual Calendar combines yellow gold with the most classic complication in all of watchmaking. Day, date, month, astronomical moon, with the week of the year displayed on the dial’s outer chapter ring and the essential leap year indication hold pride of place on the “Grande Tapisserie” decorated dial.