For Watches & Wonders 2021 Patek Philippe introduces a totally new perpetual calendar with an innovative patented one-line display that displays the day, the date, and the month on a single line in an elongated aperture beneath 12 o'clock. This new in-line perpetual calendar premières in an elegant platinum case with a blue dial. As classic grand complications par excellence, perpetual calendars have always been prominently featured in Patek Philippe’s collections.