There is one interesting line way the fuck down in the article about the clock that says: And I thought, hey, if they make it an interesting enough tourist attraction, it doesn't need to be a perpetual motion machine... just let the visitors wind it up. All you need to do is have a couple visitors a year, and it runs forever. (Assuming there are still people to visit it, of course. And if there aren't, well ... problem solved.) "... Visitors enter through jade-paneled doors, climb a massive staircase to reach a cupola made of sapphire glass. There they can wind the clock mechanism ..."
Yeah the timekeeping mechanism and the time-displaying mechanism are separate. You show up and "wind" the motion works to the point where they hit the stops. We call that a remontoire in horology.