Patek Philippe's greatest watch of all time. A one-of-a-kind supercomplication, commissioned in 1925 for Henry Graves, Jr. and eight years in the making, it features 24 complications, including a map of the stars over Manhattan's Central Park along with Westminster chimes.
Expected to sell tomorrow for $15 million at Sotheby's in Geneva.
Postscript: An anonymous buyer paid $24 million at auction.
