Aaron Kramer on this video:
I first became aware of the Baranger displays at the House on the Rock in Spring Green Wisconsin. I shot this old video of several playing in 1997. ... I did not get much info on the inner workings of these. At the auction John Daniel was nice enough to open the back of one. The were all chain driven with cogs, shafts and linkages. Electric. In editions of 30 but some were repurposed over the years. At House on the Rock they have taken parts from some and re-made their own displays.
Here is a link to a rare book on the subject: Baranger: Window displays in motion: dramatizing the jewel
[ Thanks Aaron! ]