This puzzling mechanism is a demo model to show how the Variomatic Cube works. The mechanism has four identical gears meshing with each other. The gearing ratio of the gear train varies from 1:1 to 1:2 and 2:1.
Watch the YouTube video.
Read at the Shapeways Forum.
Read more at the Non-Twisty Puzzles Forum.
Please contact Oskar directly if you are interested in obtaining a fully colored, stickered and assembled sample of this puzzling object.