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The 1982 Politoys version with a spindle mechanism.
The text on the packaging reads:
"The game develops logical and three-dimensional way of thinking both of children and adults. There are inummerable variations of mixing the 9 numbers on both surfaces. Solution: To bring in growing order the nine numbers of the same colors on both sides."
Photo #6 is copyright by Nick Baxter. All rights reserved.
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Thank you to the following people for their assistance in helping collect the information on this page: Michael Cote, Ton Dennenbroek, Sandy.
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