The Wahn's color scheme is consistent with your pictures, but you didn't show enough sides to be positive. It's white-opposite-blue, green-opposite-yellow, and red-opposite-orange. The Wahn's orange stickers were day-glo fluorescent. The pieces had mold-identifiers
The weight is a good match for the Wahn in a list of puzzle weights I posted a while back.
The Wahn was physically the same cube as Meffert's original Professor Cubes, the Bandelow Cubes, and the Krell Cubes.
The interior parts should have letters molded into them, like these edge pieces: