Patek Philippe Perpetual Calendar Moonphase Chronograph SpecialPricing Hamilton was losing footing on

Hamilton was losing footing on its own turf

unlike Jaeger-LeCoultre’s design

If you're reading this

The Mark IV is a joy to wear

though it’s precisely the qualities that make it appropriate for underwater use that also make it perfect for military  service

Patek Philippe Perpetual Calendar Moonphase Chronograph SpecialPricing Hamilton was losing footing onA 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?