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The Platinum World Time created by Patek Philippe was sold at auction for over $4 million USD in 2002. It is believed that only one was created and, at the time, it was the most expensive wristwatch in the world. This watch winds itself and you find the time anywhere in the world. This watch has a variety of finishes to choose from, yellow, white and rose gold and platinum for the discerning buyer.
https://www.wonderslist.com/top-10-most-expensive-watches-in-the-world/