Two regular each other penetrating tetrahedrons

Model 359

Category:

B IV 5; B IV 5a

Description

Two regular each other penetrating tetrahedrons. Cardboard, dismountable (simultaneously in- and outslidable, according to Möbius).
359a) Möbius tetrahedron, arising from no. 359 by collineation.

Showcase of this model is Case number 27