• Free worldwide delivery

In 1996, Patek Philippe patented the annual calendar function. This complication could be found in traditional dress watches, like the 5035J. In 2006, the Patek Philippe released four new versions of the Nautilus in order to celebrate this iconic model's 30 year anniversary. This was the first time that Patek Philippe made changes to the original design of the Patek Philippe Nautilus, so it was quite an important event. Four years later Patek Philippe introduced the reference 5726: a Nautilus with an annual calendar function and on a leather strap. First, let us clarify the annual calendar complication. This function requires one adjustment per year. Namely, at the end of February as it only recognizes 30- and 31-day months. This function stands between a normal full calendar (only recognizes 31-day months) and the perpetual calendar (recognizes 28-, 30- and 31-day months and leap years).Since the 5726 has the Nautilus design (porthole-inspired case and octagonal bezel), the traditional way of displaying the annual calendar function (three round sub dials) aesthetically didn't make sense. Therefore, Patek Philippe revealed a new dial lay-out: the day of the week and the month in two squared apertures below the 12-hour position, below a sub dial displaying a 24-hour indication and the moon phase and below this, replacing the 6-hour position, the aperture for the date.The one we have on offer is in great condition, dates back to 2016 and comes with the inner and outer box, the certificate of origin and booklets.