9. Reference 6002 Sky Moon Tourbillon watch
Worth US$1.3 million (S$1.65 million) the Patek Philippe is a very limited edition make which you have to, get this, get your application approved to buy one. It is only sold to people with a track record with the watchmaker, to ensure they 'truly appreciate' what they're getting. It's a watch that took over seven years to make and develop and is part of their Grand Complications range. No diamonds here, just white gold and a mechanical manually would movement. It has a tourbillon, minute repeater, sky chart as well as a perpetual calendar.