No 2. Franck Muller Aeternitas Mega 4

Containing over 1,400 separate components, this is perhaps the most complicated watch of all. Created by Franck Muller, it has a split-second chronograph, three different time zones, minute repeater, a huge tourbillion, elaborate date displays among others. If you have $2.7 million extra to spend, consider buying this baby.

[youtube]http://www.youtube.com/watch?v=0W6pBdabvA4[/youtube]

No 1. Patek Philippe Sky Moon Tourbillon

Not even the $2.7 million-Franck Muller Aeternitas Mega 4 beats this in terms of complexity. It has a front that has a classically ravishing design, with a perpetual calendar with retrograde date, mean solar time, moon phases and a gorgeous embossed opaline dial. And it sports a starry sky with astronomical indicators on the rear. All this, plus a tourbillion and a minute repeater. Price: $1,450,000.

[youtube]http://www.youtube.com/watch?v=2sp3qRYqa5I[/youtube]