After ten years of intensive research, Swiss watch manufacturer IWC has succeeded in uniting solar time with sidereal time, together with astronomical displays, in a single watch. The result is a fascinating universal work of art which comes with a wealth of surprising complications and new technical features. The Portuguese Sidérale Scafusia is the most complex timepiece ever created by IWC. The Portuguese Sidérale Scafusia was designed to bring together astronomical displays and to show them with absolute precision. The most conspicuous feature of this new and highly complex timepiece is the constant-force tourbillon, which dominates the dial. But the reverse side of the watch is no less impressive. Neatly packed into the tiny space are a celestial chart, horizon, geographical coordinates, solar time, sidereal time, sunrise and sunset display as well as a display showing daytime, nighttime and twilight. And behind the display showing the number of day, of course, is a completely integrated perpetual calendar. Further information on the timepiece is available here.