Patek Philippe Perpetual Calendar Cervo formed a new benchmark for

formed a new benchmark for the class

it’s accompanied by its factory goodies

and Certificate of Origin papers dated September 2016

Eterna’s watches have had a history of being taken to some of the most forbidding environments—such as Thor Heyerdahl’s three-month voyage across the Pacific in a balsa wood raft

SuperLuminova hands

Patek Philippe Perpetual Calendar Cervo formed a new benchmark forA 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?