Patek Philippe is an independent Geneva watch manufacture founded in 1839, family-owned by the Stern family since 1932. Its principal collections are the Calatrava, Nautilus, Aquanaut, Cubitus, Golden Ellipse, Twenty~4 and the Complications and Grand Complications families. Every movement is certified to the Patek Philippe Seal, the in-house standard the maison adopted in 2009 in place of the Geneva Seal, and Patek Philippe holds the highest prices achieved at auction for a wristwatch.