It is the world's most famous watch as it is the most complicated watch ever made entirely by human hand. Made by Swiss manufacturer Patek Philippe in 1933, it has an estimate of $16.8 million. 15 years ago it made a record-breaking sale and now its reappearance on the market marks Philippe's 175th anniversary celebrations.

It was sold at Sotheby's, New York, in December 1999. It becames the most expensive watch sold at auction as it was estimated at $3-5 million, but set the record by exceeding expectations, totalling $11 million.


The Henry Graves Supercomplication, 1933

Sotheby's Worldwide Head of Watches Tim Bourned, and Daryn Schnipper, the Chairman of Sotheby's Watch Division, labelled it, "the Holy Grail of watches."

"Our offering of this horological work of art in 1999 was unquestionably the highlight of our professional careers."

The incredible watch was commissioned by New York banker Henry Graves in 1925. Followng three years of research and another five of work by technicians, the watch was complete. It includes moon phases, power reserve, a perpetual calendar, indications of sunset and sunrise times. The craftsmanship of the watch has only being surpassed with the introduction of technicians used computer-assisted technology.