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A 4x4x4 truncated like an octagonal prism.
A straightforward shape variant of the 4x4x4.
The earliest known sample was made by Katsuhiko Okamoto. It was added to the museum in 2004.
The images shown here show a sample built by Andreas Nortmann.
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Thank you to the following people for their assistance in helping collect the information on this page: Katsuhiko Okamoto.
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