The starting point for the design of the Ultimate Cube 1 is the OddzOn Cube.
Each face is split along the diagonals into four triangles. Each triangle is then swapped with the triangle that shares the same edge of the cube.
This design has been produced by Ultraco in 1982.
This information has been taken from a catalog entry at http://www.TwistyPuzzles.com.
Werner Randelshofer 2006