Nr. 377
Two-sided surface with the clover leaf sling as boundary curve
Row: 1

Nr. 299
Möbius strip
Row: 1

Nr. 408
Clover leaf sling on torus
Row: 2

Nr. 408
Clover leaf sling on torus
Row: 2

Nr. 464
Model of a clover leaf sling with singularity-free surface
Row: 2

Nr. 465
3-times twisted Möbius strip with clover leaf sling as border
Row: 2

Nr. 298
Three Möbius strips
Row: 3

Nr. 298
Three Möbius strips
Row: 3

Nr. 298
Three Möbius strips
Row: 3

Nr. 392
Wooden ring with 7 neighbouring areas
Row: 4

Nr. 392
Wooden ring with 7 neighbouring areas
Row: 4

Nr. 522
Three rings that are devoured with each other, but not pairwise
Row: 4