The grand complications are the true domain of horological excellence. Patek Philippe is now enriching its broad range of calendar timepieces with a new perpetual calendar that shows the day, date, and month in a single panoramic aperture at 12 o’clock. This in-line display was already adopted in some of the manufacture’s pocket watches. But this was never done in a wristwatch, a veritable feat as regards the degree of miniaturization and the many technical challenges that had to be mastered.
To combine uniqueness with crisp legibility and high reliability, the designers developed a new self-winding ultra-thin movement: The caliber 31-260 PS QL with a recessed minirotor and a customized module for which three patent applications were filed. The in-line display system relies on four disks (of which two for the date) that are arranged on one level. It consists of 118 additional parts. It is complemented by two round apertures that show the leap-year cycle as well as the day/night indications. A further window displays the moon phases.
This extremely elaborate mechanism is premiering in a fully hand-polished platinum case with a diameter of 41.3mm and a height of merely 11.07mm. The blue dial with a black gradation to the periphery is adorned with a vertical satin finish. The course of time is displayed with applied hour markers and baton hands in white gold. The navy-blue alligator leather strap is secured with a fold-over clasp and harmonizes perfectly with the dial.