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Four layers and one orthogonal ring of moving tiles.
This version has three layers and 40 tiles in 5 sets of 8 pieces. Other puzzles with cylindrical configuration have usually a moving hole but this one doesn't need one. The pieces can be moved between the layers due to the orthogonal ring.
The inventor applied for the patent in 2004.
There is also a version with three layers.
Diameter: 53 mm
Height: 124 mm
Width: 105 grams
Thank you to the following people for their assistance in helping collect the information on this page: Andreas Nortmann.
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