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A rare puzzle. Introduced to the puzzle community by the late Edward Hordern at IPP 1992 as an exchange gift.
A clockwise twist of the front face changes the 3 colours at the marked windows (at 12, 3, 7 o'clock). Anti-clockwise twists change nothing, except reposition the marked windows for the next move.
If you're looking to buy, eBay is the one place you can find almost anything... if you're willing to wait for it, then pay the price!
Thank you to the following people for their assistance in helping collect the information on this page: Geert Hellings.
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