9 | Breguet Grande Complication Marie-Antoinette—£25 million
So you've found a spare 25 mill nestled in the pocket of some forgotten skinnies, and now you're torn on how to spend it? Don't worry: we've all been there brother.
You could do a lot worse than splash it on the 'Breguet Grande Complication Marie-Antoinette' – officially and easily the priciest watch in the world.
Commissioned by a mysterious lover of former French queen and cake advocate Marie-Antoinette, work began on the pocket watch (yeah, we're going off-piste, but just look at it) in 1782. Legendary horologist Abraham-Louis Breguet started the project, before his son finished the job in 1827.
Encased in gold, the glass showcases the intricate mechanism inside, based on the most revolutionary technologies of the time. Only the best for queeny.
Problem is, they probably spent a little too long fussing over it. As luck would have it, Mary-Antoinette was guillotined 34 years before the watch even saw light of day or the inside of a pocket.
The watch was then stolen in the late 1900s from a museum in Jerusalem, and only re-emerged in 2007. It's now locked away in the L.A Mayer museum, waiting for you to march in with a suitcase full of fifties.