Clockwork wood wall art.

I remember seeing a most fantastic piece of wall art that incorporated a wind-up clock spring, and gears, that would slowly turn and reposition figurative pieces of wood against the wall. The end result was an everchanging work of art! And when it “wound down”, one would only have to “wind it up” again. No electricity; no batteries. I remember that these pieces also went for thousands of dollars as well!

Anyone here seen the same?

-- Bob Vila would be so proud of you!