Gravity sphere clock

I have just repaired this clock, only the second I have ever come across.  The ferris wheel rotates with the weight of the balls as the spring unwinds, thus rewinding the spring sufficiently to keep the clock running.  If you occasionally pop a ball from the escape tray at the bottom onto the runway at the top, the clock should never stop. In the photo, you get a few selfless thrown in for good measure!  In other news, I have successfully backed up all my photos online and also migrated iPhoto to an external drive.  Hopefully, that will speed up the computer a little.