The Midnight Planétarium by Van Cleef & Arpels
The movement of each planet is true to its genuine length of orbit: it will take Saturn over 29 years to make a complete circuit of the dial, Jupiter will take almost 12 years, Mars 687 days, Earth 365 days, Venus 224 days and Mercury 88 days.
OMG look at this watch, how neat is that????
And how fantastic is it that you saw this and thought of me? :D