Sotheby's experts estimated that this watch would sell for between $3 million and $5 million, but due to intense competition, bids soared to more than $11 million in 1999. With 24 complications or functions and two faces. This 18kt yellow-gold pocket watch took four years to build and still holds the record for the most expensive watch (non jewelery watch) ever sold. It is Patek Philippe Cal. 89. Only one is known to be produced!
If Patek Philippe produces two pieces, the auction price will not that high, it may reach 3 millions only... As this is a very heavy pocket watch which you never want to wear it in your pocket!