Hybris Mechanica a Grande Sonnerie

Hybris Mechanica a Grande Sonnerie is the most expensive Jaeger Lecoultre watch. In 2009, this was the most complicated wristwatch, though the title has since been taken by Vacheron Constantin. In total, there are 26 complications, including a perpetual calendar and a unique chime function that mimics the chimes of Westminster. The timepiece also features an intricate, 1,300-part flying tourbillon and a partially skeletonized case.

The Hybris Mechanica Grande Sonnerie is said to be the world's only sonnerie watch capable of doing specific chiming chores, such as playing the whole Westminster chimes song. The Hybris Mechanica Grande Sonnerie watch has reportedly achieved the holy grail of sonnerie timepieces.

Price: $2.5 million.