Siefert SurfacesThis cube is a Mathematical Art cube, showing six Siefert Surfaces.
SiemensThis 3x3x3 cube advertises Siemens microcontroller technology.
Six CubeAn edges only 3x3x3 in shape of a Burr Puzzle.
Six Windmills CubeA doctrinaire shape-variant of a 3x3x3 with Windmill Cube faces on all six sides.
Sixcone 3x3x3 V1A 3x3x3 truncated with six intersecting cones in a shape closely resembling the Steinmetz solid.
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