warranty card from Tourneau dated to 1999
This chronograph is an excellent example of what Yema (alias LeJour) was up to in the 1960s
moonphase at 6 o’clock and date around the perimeter of the dial
but that doesn't diminish our appreciation for this killer timepiece
The particular Reverso we have here is a Classique
Patek Philippe Perpetual Calendar Chronograph 5270G Tray warranty card from Tourneau datedA 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 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?