Patek Philippe Moonphase
18kt Perpetual Calendar
This magnificent beauty sold at Christies Auction House on May 10, 2010 for $289,259. In was manufactured in 1954 and it's 37mm. This is probably the most beautiful watch ever made. Patek Philippe launched the Reference 2438/1 in 1951 and it was water-resistant, and at the same time Patek Philippe also launched the 2497, which was not water-resistant.