Patek Philippe is widely considered to be one of the most prestigious watch manufacturers in the world. Over the years, notable Patek Philippe patrons and timepieces owners include Queen Victoria, Queen Elizabeth II, Pope Pius IX, Marie Curie, Albert Einstein, John F. Kennedy, Nelson Mandela, Pablo Picasso, Pyotr Tchaikovsky and Leo Tolstoy. As of December 2019, among the world’s top ten most expensive watches ever sold at auctions, seven are Patek Philippe watches. In particular, Patek Philippe Grandmaster Chime Ref. 6300A-010 currently holds the title of the most expensive watch (and wristwatch) ever sold at auction (31.19 million US dollars or 31 million CHF), while Patek Philippe Henry Graves Supercomplication, the world’s most complicated mechanical watch until 1989, currently holds the title of the most expensive pocket watch ever sold at auction (24 million US dollars or 23,237,000 CHF).