World's most expensive watches

Wrist watches for U.S. $ 6.5 million (Rp.65 billion), were bought by a European squillionaires, made by Swiss watchmaker Vacheron Constantin, which makes it a new clock in the world's most expensive. This clock takes many years to make.

Here are its features :
* Perpetual calendar and leap year
* Star chart and celestial annual calendar
* Tourbillon regulator
* Sunrise and sunset indication
* Perpetual time equation
* Phases and age of the moon
* Substantial power reserve
* Multiple time zones and day-night indication