-Established in 1839, Patek Philippe takes pride in being one of the oldest watchmakers in the world. The Swiss brand’s horology expertise and impeccable know-how are combined with a timeless aesthetic to create emblematic timepieces, like this 2008 pre-owned Complications Annual Calendar Moonphases 39mm: the 18kt white gold case carries high-precision functions such as an annual calendar, day-date display and moon phase indication, making justice to its name.