In 1976, Patek Philippe introduced the Nautilus. Twenty years later, in 1996, they unveiled the annual calendar complication. In 2010, both innovations merged in the Annual Calendar Nautilus ref. 5726. The inaugural model, the Nautilus ref. 5726A-001, featured a 40.5mm stainless steel case and a black dial, mounted on a black leather bracelet. It housed the automatic Caliber 324 S QA LU 24H/303 movement, offering an annual calendar and moon phase display. In 2012, Patek Philippe expanded the lineup with two new versions, featuring stainless steel Nautilus integrated bracelets, reminiscent of the original design. In 2019, Patek Philippe replaced the black and white dial models with the blue dial, similar to the one offered here. The reference 5726/1A-014's blue dial was inspired by the original Nautilus of 1976, the reference 3700. This specific piece was sold in October 2020. As you can see from the pictures, the watch looks new. Although it was worn as little as three times (with extreme care), no major scratches or signs of wear can be seen. It was initially sold in Geneva and is delivered with its full set, coming directly from the first owner. We are proud to offer this stunning Nautilus, arguably the most aesthetic in the current lineup of Patek Philippe. The 5726 has indeed solidified itself as a future collector's item and a historically important Nautilus.