Patek Philippe Retrograde Perpetual Calendar

  A perpetual calendar is like a small computer on your wrist. Think of it this way: Imagine a watch that keeps track of not only the time, but also the date, the day of the week, and the month, and also tells you whether it’s a leap year or not, and what the current phase of the moon is. Oh, and one more thing — imagine it does all of this mechanically, using springs and gears, and that you only have to adjust it once every century or so. Crazy, right? Perpetual calendars are Patek Philippe’s speciality — it’s been making them in series since the 1940s. This particular quantieme perpetual, a Reference 5140R-011 dating to circa 2018, is a true beauty. Housed in a 37mm 18K rose gold case, it features a sapphire crystal, sapphire exhibition caseback, 18k rose gold signed crown, and a beautiful, satin silver ‘Tiffany’-signed dial with applied rose gold indices and matching dauphine handset. Powered by the Cal. 240 Q automatic movement with micro-rotor, it’s absolutely a piece of horologic