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Four rings of ten balls each.
- Inventor: Unknown
- Mechanism: Moving Marbles (3D + 1x1xN)
- Patents: Unknown
- Producer: Unknown
- Year: Unknown
- Original Price: $0.00 USD
- Current Price: No Data
There exists another version (search for "Screwball" in the museum) with a middle layer that is one marble thick.
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Thank you to the following people for their assistance in helping collect the information on this page: Geert Hellings. If you have any information or images that you would like to contribute to this entry, please click the apropriate add () or edit () icon above, or use the following links to modify this item, add a recent sale price or to add a new link.