Fine Watches: An exceptionally rare and highly important pink gold Patek Philippe expected to fetch up to $2.5 million will highlight of Christie's Important Watches sale in Geneva on November 15. The two crown world time wristwatch with 24 hour indication and blue enamel dial, Ref. 2523 (above), was manufactured in 1953. In addition to Ref. 2523, two other pink gold Pateks in the sale are expected to top out at over $1 million as well. These three models have scarcely been produced in yellow gold and only on very rare occasions in rose gold.

A perpetual calendar chronograph wristwatch with moon phases, Ref. 2499, manufactured in 1957, estimated at up to $1.25 million; and a perpetual calendar chronograph wristwatch with phases of the moon, Ref. 1518, manufactured in 1948, estimated at up to $1.03 million. It’s extremely rare to have all three of the watches in the same auction, all on the market the first time: an almost unique opportunity for any watch collector to purchase a masterwork of horology. 388 lots in total will be offered in two sessions during the historic sale and are expected to realize a combined total estimated in excess of $13 million.