These two speak for themselves... Forget those moon phases, dream much higher. The Astrarium of Giovanni Dondi dell'Orologio A complex astronomical clock built between 1348 and 1364 in Padova , Italy, by the doctor/clock-maker Giovanni Dondi dell'Orologio...
... from the historical and scientific point of view, other astronomical timepieces would beat it in accuracy and complexity. I recall that Rolf Schnyder acquired one of the few good reconstructions of Dondi's Astrarium and exhibited it in Ulysse Nardin's...
... while the gears necessary to drive a planetarium have not been found on the remnants of the Antikythery mechanism, there is some evidence that the five planets visible to the naked eye had been displayed by hands. If I only had enough money to buy one...