Patek Philippe Sky Moon Tourbillon

Patek Philippe. Get used to that name, you’ll be seeing it again. This rare timepiece has two faces and a reputation as being the watchmaker’s most complicated model. It has a perpetual calendar, retrograde date and lists the lunar phase. A flip of the watch reveals a celestial view detailing the sidereal time and a skychart that traces the stars and phase and orbit of the moon.
A platinum Patek Philippe tourbillon watch became one of the most expensive modern wristwatch to be sold at auction in Hong Kong on April 10, 2008.
The "Ref. 5002 P Sky Moon Tourbillon" wristwatch with a double dial is considered the most complicated wristwatch ever produced by the renowned Swiss watchmaker. Only two such watches are made every year, one in platinum and one in rose gold. The watch, made in 2003, was bought by an Asian private buyer at the Sotheby's auction.
The Sky Moon Tourbillon Ref. 5002 is the most complicated wristwatch ever produced by Patek Philippe and also the workshop's first double-face wristwatch. Its movement consists of 686 parts, some of which are microscopically small. This rare and exceptional timepiece features mechanical movement that must be manually wound, a minute repeater with tourbillon escapement, chime with two “cathedral“ gongs activated by a slide piece in the case, perpetual calendar with retrograde date hand, hours and minutes of mean solar time, day, month, leap year by hands and moon age.
price: $1.4 million.