Ulysse Nardin is one of the world's best-known manufacturers of complication watches, which include very elaborate functions based solely on mechanical mechanisms, without the use of any type of electricity. And one of the company's best-known complication watches is the Planetarium Copernicus, a device that has already become a collector's item and will certainly reach some pretty "astronomical" prices in the future.

As the name says it, this very peculiar watch is inspired by the concept of Ptolemy's geocentric universe with the Earth at its center, and Copernicus' heliocentric universe with the Sun at its center. This allows the reading of the astronomical positions of the planets in relation to the Sun and the Earth. Furthermore, a perpetual calendar indicating the months and the sign of the zodiac completes one turn in 365.24 days at the exterior.

It's also quite important to note that the case of the watch is manufactured out of one of the most expensive materials on Earth, platinum. Furthermore, the watch is not exactly very large (just a 41-mm diameter), while the self-winding mechanism provides not only a very accurate functioning, but also a power reserve of around 42 hours.

The Planetarium Copernicus has also been equipped with a sapphire crystal glass, which allows users to take a peek at the very complicated mechanism even if they happen to be swimming underwater (water resistant down to 30 meters). The whole assembly is completed by a high-quality leather strap and a standard buckle.

The Planetarium Copernicus has been released in a very limited edition, since just 100 such products were ever made. This is one of the reasons why the list price is absolutely huge, namely around 72,000 US dollars, but taking into account that so few models have been released, it's sure to represent a very sound investment for the future.