Göttingen Collection of Mathematical Models and Instruments

	(296) Boy's surface with three critical points		(297) Boy's surface with symmetry axis
	(298) Three Möbius strips		(299) Möbius strip
	(301) Heptahedron (one-sided surface)		(346) Projective plane
	(347) Tetrahedron in the projective space		(365) Large frustum of pyramid
	(373) Boy's surface with symmetry axis		(374) Möbius strip with a sphere as boundary curve
	(377) Two-sided surface with the clover leaf sling as boundary curve		(392) Wooden ring with 7 neighbouring areas
	(408) Clover leaf sling on torus		(464) Model of a clover leaf sling with singularity-free surface
	(465) 3-times twisted Möbius strip with clover leaf sling as border		(522) Three rings that are devoured with each other, but not pairwise
	(931) Klein bottle