The most expensive watches in the world and everything you need to know about it

Completely covered with hundreds of diamonds, the Piaget Emperor Temple is two clocks in one. Its dial - with a background made of Polynesian mother-of-pearl - is hidden behind a small little window inserted on a kind of pyramid that also opens, revealing a second internal clock. Only one unit of Emperor Temple was produced - and sold for $ 3.3 million - but Piaget accepts orders if you are interested in parading with a specimen on the wrist.