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Two intersecting circles of which one can be twisted.
First it looks like a traditional puzzle with two intersecting cirlces. Puzzles like this have been produced numerous times, e.g. the Puzzler. Duplex 2 has two sides and pieces can be exchanged between the two. This is done by twisting a big part of the puzzle.
It is implemented with magnetic pieces.
Size: 150 x 100 x 20 mm
Diameter of one circle: 80 mm
Weight: 250 grams
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