World's most expensive watches

The Swiss-made Chopard Super Ice Cube features 60 carats of diamonds cut into perfect cubes. This luxury watch and bracelet is water resistant to 100 feet. $ 1.1m

Housed in an elaborate 18-karat white gold case, the Patek Philippe Sky Moon Tourbillonit has a solid gold dial coated with blue enamel in champlevé and cloisonné techniques to create artistic functional elements. Only three to five will be completed per year. Around $1.2 million.

The Tour de I’lle is a complicated wrist watch manufactured by the Swiss manufacturer Vacheron Constantin. It was released in 2005 in a limited edition of 7 pieces to commemorate the manufacturer's 250th anniversary. This two sided 18 karat gold watch has a blue sapphire non-reflective glass. $1.5m

The Platinum World Time created by Patek Philippe was sold at auction for over $4m in 2002. It is believed that only one was created and, at the time, it was the most expensive wristwatch in the world.

The 18-karat gold pocket watch Super Complication made by Patek Philippe for banker Henry Graves Jr. in 1933 required five years to design and build. It possesses 24 “complications,” or mechanical features beyond basic timekeeping, including a different chronological function for each hour of the day. It was the most complicated watch ever created and the most expensive watch ever sold at auction. $11m.

This Swiss-made Chopard watch features three heart-shaped diamonds of 38 carats, surrounded by white and yellow diamonds weighing 163 carats. $26m.