Here is the mystery Water Wheel Industrial Ball Bearing Clock comes with an 8 day movement and keeps very good time. It has a big paddle wheel on the right side which holds a set of small steel ball bearings. The weight of these balls is propelling the clock. Time shows a thin glass dial with Roman numerals. Every 60 seconds, a small ball drops down from the water wheel onto the track where the steel ball rolls to the left side. The bucket catches the ball and moves it up one by one. Every 60 seconds, a ball bearing drops from the left bucket on the channel to the waterwheel. Then the bucket drops down and goes around catching another ball bearing. The loop goes on as the clock keeps on running. The power is received from an 8 day fusee movement inside the wood base, which has beautiful Red Ash veneer. The whole animation of this clock is just like a waterwheel except it's ball bearing "flowing" through channels and there is a clock on the big water wheel. The clock is protected by a glass dome. It measure 17-3/4" tall, 17-3/4" wide, and 8-3/4" deep including the glass dome.