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A very rare version of the original Swissmad. It presumably never made it into production.
For general information about the Swissmad see the other entry in the museum.
This is the very rare version of the puzzle with four colors. It has a grey frame and the pieces are yellow, green, black, and purple. Every combination of front and back colours occurs exactly once. If each quadrant on the front has one colour, there are only six fully symmetric patterns the back can have.
Width: 85 mm
As far as it is known this variant never hit the market.
This puzzles was presented 2004 on the design competition during IPP24 under the name "Quadri"
Thank you to the following people for their assistance in helping collect the information on this page: Andreas Nortmann, Jaap Scherphius.
This puzzle can be found in collections of these members:
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