Four unusual cubic "J" puzzles submitted to the Puzzle Exchange by the Finnish contingent at IPP19, held in London in 1999. Each acrylic plate in each cube has a "J" attached to it. Apparently, the 24 plate/J combinations can be reassembled to form 200 different cubes! The puzzle was invented by "the great Finnish puzzle inventor" Juha Levonen, who was one of the four participants. The other participants were Pekka Leppanen and Markku Vesala, both former regular Puzzle Exchange participants, and the late great Matti Linkola.
The four cubes are complete with instructions, as received at IPP19.
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