Given how simple we've made timekeeping over the years, it was inevitable that luxury watches would have to move into more esoteric lands in order to exude the appropriate sense of wonder when witnessed by those who can't afford them. You might call that the Xperia Pureness effect . Ergo, quite aside from its platinum or 18-carat gold construction options, the 4N watch tries to grab the spotlight with its quirky disc-based mechanism, which rotates numbers (four numbers, hence 4N) into position to display a digital readout of the time. The fact that all three discs -- built out of aluminum or a titanium alloy -- and the MVT01 movement are exposed to the eye earns geek cred from us, while the limited run of only 16 units should ensure the desired exclusivity for the watches' future owners. As the old saying about price goes, if you have to ask, you can't afford one.