Patek Philippe added the 5726/1A to their Nautilus line at Basel this year. This sporty steel annual calendar is 40.5 mm in diameter. The watch houses Patek Philippe’s Caliber 324S QA LU 24H, a self-winding movement. The watch functions include hours, minutes, seconds, annual calendar with day of the week, month, date and moonphase. This watch is available with a black or white dial. Expected retail price is $47,600.