The Aquarius Planetarium Watch by Klaauw

The Aquarius Planetarium watch created by Dutch designer Christiaan Van Der Klaauw is now being called the world’s smallest functioning planetarium, this timepiece is known to track the whole solar system with the sun and 6 planets around it, apart from displaying time. Featuring extensive astrological designs on the dial, and a being a part of 12 exclusive timepieces, this is perfect horological melting pot of astronomy and astrology.
Housed in a platinum casing which is 40mm wide, the dial features extensively detailed artwork in pure white gold, featuring an astrological sign, which in this case is Aquarius. 
At the 12 ‘o’clock position is the multi-ring planetarium, which has the sun at the centre around which the planets of the solar system are shown revolving. 

Outside the planetarium rings are the various astrological positions marked in black on a metallic finish base. On the other hand, the 5 ‘o’clock position sees a round dial with a thin matte finished arm, pointing out to the month of the year, along with the relative position of the sun. The hours, minutes, and seconds also are displayed through similar looking thin arms, which virtually seem disappearing into the extensively prominent astrological artwork.
Under the hood, the timepiece has a CK1196 caliber movement, which has a self-winding mechanism with a built in planetarium module. The rotor of the watch however, will be visible at the case back, which itself has been created with 18-carat gold, and also has been hand engraved by Jochen Benzinger. 
In all, there will only be 12 of these timepieces, the Aquarius being one of them. The price tag attached is €79,500 ($103,955) for each of these collector watches, which will be every horological addict’s indulgence.
Source