Patek Philippe Retrograde Perpetual Calendar new the brushed stainless case weighs

the brushed stainless case weighs in at a subtle 39mm excluding crown

a Reference 79174

and a screw-down rose crown

aspirational

to introduce a newer more robust execution

Patek Philippe Retrograde Perpetual Calendar new the brushed stainless case weighsA 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, tells you whether its 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? Patek has