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This is a new puzzle consisting in two nested spheres that you have to take apart.
Each sphere is made of two parts and the border of these two parts has the same shape as the single edge of the Dual Sphericon.
This is one of the four parts of the Smooth Dual Sphericon puzzle. You need
- two "half outer shell" parts
- and two "half inner shell" parts
to have the complete puzzle.
See also the Dual Sphericon Pendant. Do not mix Smooth with Creased Dual Sphericon puzzle: they are not compatible!