this was a small part of a series of steampunk kinetic public artworks . called "apparatus for viewing transdimensional mechatronic variants of a set cause"_ M3use the provided stl file. You may need to upscale it as I used a ultra hi def printer to make this oneI also had this one cast in silver the video is of the insides http://www.youtube.com/watch?v=GiOwyttqJ50www.artplusdesign.com.au