As I discussed in my earlier article on the Gerald Genta version

No wrist watch I have ever seen had more complex buttons and such all around the case. There is the wild-looking crown, a four-way rocker switch, switches that flip around, and maybe a bit more. It is all pretty nuts, but it is all there for a reason. The original designers of the movement had no intention of making it more complex than it needed to be - and tried to give the user as simple a time as is possible. Hungry to learn more about how it works? Bulgari even created a dedicated iPhone app just for the watch that you can check out here. I would not call the movement so much beautiful as I would call it impressive. What it lacks in elegance, it makes up for in "wow." With so much going on, and the almost avant grade design of it, elegance is pretty much thrown to the curb. That's OK, though, as the concept is as artful as it is a feat of micro engineering. As a sonnerie, the watch will sound out the time to you at certain intervals. It sounds them out like a minute repeater using a code of chimes created by several gongs and three hammers. This watch is the most complex sonnerie timepiece ever. You can see the hammers in action in the dial. The movement itself has something like 850 parts and is called the Caliber 31001.