This 5x5x5 cube is one of the earlier version of 5x5x5 cubes. It came in a clear soft plastic box with a single page instruction sheet. It shows "5x5x5 Magic Cube, The Very Ultimate in Cube Puzzles" on the instruction. Based on my research, it was manufactured by Meffert and sell by Professor Christoph Bandelow in Germany. Some people think it is the same as the "Arxon Wahn". However, I could not find enough evidence to prove it. p.s. 5x5x5 Cubes were invented by Udo Krell and produced by Uwe Meffert in 1983.