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Ten Billion Barrel (Professor)
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A ten billion barrel with two extra layers including 20 additional marbles.

This is the end of the extension line. Adding more than 2 layers won't work correctly because the uppermost marbles would sit lower than the separation line between the layers. This is an problem in this modification as well but here it still works.
The year given here is an upper bound. This puzzle was shown in "The book of ingenious an diabolical puzzles" from 1994.
Diameter: 56 mm
Height: 126 mm
Weight: 213 grams



Thank you to the following people for their assistance in helping collect the information on this page: Andreas Nortmann.


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