Dutch watchmaker Christiaan van der Klaauw seems to have a thing for astronomical watches. The Planetarium 2000, for example, which sells for $23,700, shows the 6 innermost planets as they orbit a tiny sun. Very cool! (w/pic)
Presumably, the orbital times are depicted accurately, and Saturn does indeed take 29.458 years to complete it’s turn around the dial.
Nice watch, but it might be a pain to have to reset it - imagine turning the crown for several hours in order to realign the planets.
Via Cool Hunting