Patek Philippe & Co. (PP) is a Swiss ultra-luxury watch manufacturer founded in 1852, located in Geneva and the Vallée de Joux. It designs and manufactures timepieces and movements including some of the most complicated mechanical watches. It is considered by many experts and aficionados to be one of the most prestigious mainstream watch brands along with Audemars Piguet, Vacheron Constantin, and A. Lange & Söhne.[4]